A

Zero to unity factor for relative nitrification rate. (units: )

A

Logical variable to check if maximum temperature has been changed without changing minimum temperature or vice versa. (units: )

ACCDAY

Ratio of proportion of development from beginning of pod addition (NPOD0) to normal end of pod addition (NDSET) completed tonight to maximum possible proportion completed (ACCSTD) (not used in PNUTGRO). (units: )

ACCDAY

Fraction of physiological time completed today from NDSET (normal end of pod addition if optimum conditions) to R8 physiological maturity. Used after NDSET to reduce potential pod addition rate to zero by maturity. (units: )

ACCSLA

Cumulative fraction of development from beginning bloom (R1) to day on which maximum number of V-stages occurs (NDLEAF) completed to date -- vegetative partitioning is a function of this accumulator (goes from 0 to 1). (units: )

ACCSTD

Maximum proportion of total development from beginning of pod addition (NPOD0) to normal end of pod addition (NDSET) which can be completed in one night if temperature is optimum and the night time accumulator is accumulating at its maximum rate (night length is above optimum (TNLG0)), (currently not used in PNUTGRO). (units: )

ACDATE

Date of chemical application, operation (units: d)

ACHAMT

Amount of active ingredient applied. (units: )

ACHCOD

Code of chemical applied. (units: )

ACHDEP

Depth of incorporation, weed control op. (units: cm)

ACHME

Method of weed control application. (units: )

ACREFC

Number of acres per hectare. (units: )

ACTIM

Timing of application relative to crop. (units: )

ACTSW

Extractable (available) soil water content in the fruiting zone. (units: cm³/cm³)

ADDSHL

Shell growth, intermediate variable only, mass/cohort/m² (Starting with oldest) (units: g/m²)

AFLW

Actual reduction ratio for addition of flowers for a given cohort determined from RFLWAB, photothermal accumulator (TDUMX2) and pegging zone soil water (SWADD2), latter for peanut only. (units: none)

AG2

AGEFAC

Reduction in photosynthesis which is correlated to a decrease in % nitrogen in the leaves (Boote, 1976). (units: )

AGRLF

Units of glucose required to produce one unit of leaf tissue. (units: )

AGRLF

Carbon requirement to produce one gram of leaf tissue, without considering cost of amino acid synthesis. (units: g CH2O/g tissue)

AGRRT

Units of glucose required to produce one unit of root tissue. (units: )

AGRRT

Carbon requirement to produce one gram of root tissue, without considering cost of amino acid synthesis. (units: g CH2O/g tissue)

AGRSD1

The grams CH2O required to synthesize 1g of seed and not including seed nitrogen (protein?) (units: g CH2O/g seed tissue)

AGRSD1

Units of glucose required to produce one unit of seed when protein must be made from scratch. (units: )

AGRSD2

Units of glucose required to produce one unit of seed when protein is available through mining. (units: )

AGRSD2

Carbohydrates required to make seed from nitrate. (units: g CH2O/g seed tissue)

AGRSH

Units of glucose required to produce one unit of shell. (units: )

AGRSH1

Grams of carbohydrate required to synthesize one gram of shell tissue (Does not include nitrogen). (units: g CH2O/g tissue)

AGRSTM

Units of glucose required to produce one unit of stem. (units: )

AGRSTM

Carbon requirement to produce one gram of stem tissue, without considering cost of amino acid synthesis. (units: g CH20/g tissue)

AGRSTM

Units of glucose required to produce one unit of stem. (units: )

AGRVG

Carbon requirement to form one gram of vegetative tissue, without considering the cost of amino-acid synthesis. (units: g CH20/g tissue)

AGRVG

Units of glucose required to produce one g of dry weight of vegetative tissue. (units: g CH2O/g dry weight)

AGRVG2

Carbon requirement to form one gram of vegetative tissue including the cost to synthesize amino-acids (or proteins?). (units: g CH20/g tissue)

AIRAMT

Amount of irrigation applied, if fixed, for automatic irrigation (units: mm)

ALBEDO

Integrated crop and soil albedo. (units: )

ALPGR

Units of glucose required to produce one unit of total plant dry weight. (units: g CH2O/g dry weight)

ALPHA

Gram of seed made from one gram of protein remobilized from other plant tissues.

ALPHBR

Weight of seed which can be made from one gram of protein, if the protein is used to supply energy and carbon skeletons as well as protein for the seed. (units: g/g)

ALX

Current Julian date as a radian fraction of 1 year for soil temperature caculations

AMIR

Irrigation depth (DEPIR) of the NAPth application. (units: cm)

AMOUNT

Amount to change variable in weather modification. (units: )

AMP

Annual amplitude in mean monthly temperature. (units: ^oC)

AMTMIN

Irrigation applied only when the amount computed by the model (when IIRR=3) exceeds this value. (units: )

AMTNIT

AMTRD

Daily atmospheric transmission coefficient or ratio of solar to extraterrestrial ration. (units: )

AMTRD

Daily atmospheric transmission from global and normal extra-terrestial radiation. (units: )

AMTRH

Hourly atmospheric transmission coefficient or ratio of solar/extraterrestrial ration. (units: )

ANH4

Total extractable ammonium N in soil profile (units: kg N/ha)

ANO3

Total extractable nitrate N in soil profile (units: kg N/ha)

ANS

Character variable which is read from the terminal -- used as a pause -- program continues when carriage return or some character plus a carriage return is entered by the user. (units: )

ANTOP

Maximum proportion of scheduled leaf and stem mass increase which can be shifted to roots if night length is greater than the optimum (VARN0). (units: )

APTOP

Maximum proportion of scheduled leaf and stem mass increase which can be diverted from roots to shoots if solar radiation is zero (i.e. dark). (units: )

AREAH

Total area of healthy (undiseased) leaf. (units: cm²/m²)

AREALF

Total leaf area. (units: cm²/m² ground area)

ARG

Exponential argument for nighttime temperature decay including B and relative time (Parton and Logan, 19??). (units: )

ARG

Array of X-values to be used in interpolation -- dimension specified in calling subroutine by variable passed as K. (units: )

AS

Asin(TT), in calculation of day length. (units: )

ASTRES

Average reduction in turgor (TURFAC) during a given growth phase, due to soil water deficit, 0 to 1.0. (units: )

ATHETA

Average available water % in top irrigation management depth (DSOIL) m of soil. (units: )

ATOP

Maximum proportion of top growth that can be partitioned into roots if severe water stress occurs. (units: none)

ATOP

Maximum fraction change in partitioning from top growth to roots if severe water stress occurs. (units: )

ATTOP

Maximum proportion of scheduled leaf and stem mass increase which can be shifted to roots if temperature is not optimum (number of physiological days accumulated in one day (DTX) less than 1.0). (units: )

AVGSW

Average soil moisture percent to depth SWPLTD. (units: )

AVGSW

Average volumetric soil water in top 30 cm. (units: )

AVTEM

Average temperature effect during pod development and lag seed period for each cohort of pods based on Eglis' data. Used for shell and seed number determination. (units: none)

AVTEM

Average temperature occurring during the early growth of each individual shell until seeds are added (LAGSD physiological days). Array is 200 for up to 200 shell cohorts. (units: ^oC)

AW

Available water used in soil temperature calculations (units: cm)

AWR

Assimilate area to weight ratio (units: cm²/g)

AZZON

Solar azimuth (+/- from S). (units: deg)

B

Temporary variable. (units: )

B

Logical variable to check if maximum temperature has been changed without changing minimum temperature or vice versa. (units: )

BD

Bulk density of soil. (units: g/cm³)

BDATE

Beginning date in weather file. (units: )

BETA

Exponent in Brooks-Corey equation. (units: )

BETA

Solar elevation (+/- from horizontal). (units: deg)

BETAL

Proportion of leaf increase in dry weight which is protein available for remobilization to seeds. (units: )

BETAR

Proportion of root increase in dry weight which is protein available for remobilization to seeds. (units: )

BETAS

Proportion of stem increase in dry weight which is protein available for remobilization to seeds. (units: )

BETASH

Proportion of shell increase in dry weight which is protein available for remobilization to seeds. (units: )

BETN

Spacing between adjacent plants. (units: m)

BPPHP

Number of physiological days which would have been accumulated in 24 hours if the night time temperature had remained the same during whole night (between 0 and 1). (units: )

BPS

Value for between plant spacing entered by the user. (units: m)

BPTMP

Night time temperatures corresponding to BPPHP. (units: oC)

C

Temporary variable. (units: )

C1

Temporary constant in computation of day length. (units: )

C2

Temporary constant in computation of day length. (units: )

CADLF

Carbon added to leaves. (units: g/m²/d)

CADST

Carbon added to stems, based on CADSTF. (units: g/m²/d)

CADSTF

An input to the model that represents the proportion of carbon added to stems, assuming that it is greater than the amount of carbon added to leaves, on a per weight basis. (units: none)

CANHT

Canopy height. (units: m)

CANHT

Rate of increase in canopy height and update height. (units: )

CANNAA

CANWAA

CANWH

Canopy width. (units: m)

CANWH

Rate of increase in canopy width and update width. (units: )

CAVTOT

Total potential available carbohydrates based on PG availability, XFRT and carbon mined. (units: g CH2O/m²/d)

CAVTOT

Total potential available CH2O for reproductive growth. (units: )

CC

Crop code. (units: )

CCOS

Temporary constant in computation of day length. (units: )

CDAY

Days since planting. (units: )

CDMREP

Carbon demand for reproductive growth, based on new plus mineable carbon. (units: g CH2O/m²/d)

CDMREP

Total CH2O needed for potential reproductive growth. (units: )

CDMSDR

CH2O required for this seed growth from mobilized N. (units: )

CDMSH

C needed for growth. (units: )

CDMSH

CH2O required for the potential shell growth. (units: )

CDMTOT

Total carbon demand for vegetative and reproductive tissue growth, including respiration cost on a protein basis. (units: g CH2O/m²/d)

CDMVEG

Carbon demand for vegetative growth based only on new photosynthate. (units: g CH2O/m²/d)

CEP

Cumulative transpiration after germination. (units: mm)

CES

Cumulative evaporation after germination. (units: mm)

CET

Cumulative evapotranspiration after germination. (units: mm)

CF

Temporary variable used in leaf area reduction calculations. (units: )

CHANGE

Change in the accumulators on day N since the occurence of the reference stage

CHARTEST

Character variable containing the contents of the last line read by the IGNORE routine. (units: )

CLDAM

Cumulative leaf mass destroyed by pests. (units: g/m²)

CLEFT

C Left to grow new nodule mass. (units: )

CLG

CLOUDS

Relative cloudiness factor (0-1). (units: )

CLOUDS

Daily cloudiness factor (range: 0-1). (units: )

CLSEN

Cumulative leaf mass senesced. (units: g/m²)

CLSEN

Cumulative senesence. (units: )

CLTV

Cultivar code. (units: )

CMINEP

Amount of carbon mined from plant carbohydrate pool. (units: g CH2O/m²/d)

CMINEP

The amount that is mined from the plant carbohydrate pool. (units: g CH2O/m²)

CN1

Intermediate quantity used to calculate daily runoff. (units: )

CN2

Soil conservation service runoff curve number used to calculate daily runoff. (units: )

CNIT1

Y-intercept of the equation relating reduction in gross photosynthate (PG) to average canopy nitrogen content. (units: )

CNIT2

Linear coefficient of the equation relating reduction in gross photosynthate (PG) to average canopy nitrogen content. (units: )

CNIT3

Quadratic coefficient of the equation relating reduction in gross photosynthate (PG) to average canopy nitrogen content. (units: )

CNMINE

Amount of carbohydrate required to mine for protein. (units: g CH20/m²/d). (units: )

CNMOB

Fraction of available vegetative protein pool which is mobilized per physiological day for variety I. (units: )

CNOD

Compute C used in N-fixation and nodule growth (including respiration costs)

CNODCR

C requirement for nodule respiration (units: g C/g nodule/d)

CNODMN

Minimum C reserved for nodule growth left after N fixation. (units: )

CNOFIX

Compute C used for N-fixation. (units: )

CNOLD

Amount of carbohydrate left over after taking into account the requirement for vegetative and reproductive growth (to see if it can be used to reduce nitrogen). (units: g CH2O/m²/d)

CO2

Carbon dioxide concentration of air. (units: ul/l)

CO2ADJ

Carbon dioxide adjustment amount. (units: ul/l)

CO2BAS

Carbon dioxide base level from which adjustments are made. (units: ul/l)

CO2FAC

Carbon dioxide adjustment factor (Addition, Subtraction, Multiplication, Replacement). (units: )

CONGR1

Proportion of the total difference between maximum allowable leaf mass per unit leaf area (SLW) and current SLW which the canopy can add in one day (0.3), (currently not used in PNUTGRO). (units: )

CONSD1

Y-intercept of the quadratic equation relating reduction in the maximum seed and shell growth rates to daily average temperature. (units: )

CONSD2

Linear coefficient of the quadratic equation relating reduction in the maximum seed and shell growth rates to daily average temperature. (units: )

CONSD3

Quadratic coefficient of the equation relating reduction in the maximum seed and shell growth rates to daily average temperature. (units: )

CONST

Constant used in half-wave computation of hourly radiation. (units: rad/s * J/MJ)

CORR

Correction to decrease diffuse radiation by the circumsolar component, since circumsolar diffuse radiation acts like direct radiation (Spitters, 1986). (units: )

COS90B

Cosine function used in the calculation of circumsolar radiation (Spitters, 1986). (units: )

COSB

Cosine function used in the calculation of circumsolar radiation (Spitters, 1986). (units: )

CP

Coupling point name. (units: )

CRAIN

Cumulative precipitation after germination. (units: mm)

CRLF

Cumulative root length flux. (units: )

CRLV

Cumulative root length density. (units: ).

CRTM

Cumulative root length mass. (units: )

CRUSLF

Carbon mined out of leaves to use for growth. (units: g CH2O/m²/d)

CRUSRT

Carbon mined out of roots to use for growth. (units: g CH2O/m²/d)

CRUSSH

Carbon mined out of shells to use for growth. (units: g CH2O/m²/d)

CRUSST

Carbon mined out of stems to use for growth. (units: g CH2O/m²/d)

CSDC

Cosine of the solar declination, used in day length calculation. (units: )

CSLT

Cosine of the latitude, used in day length calculation. (units: )

CUMDEP

Cumulative depth of the soil profile. (units: cm)

CUMRAT

CUMSW

Cumulative soil moisture. (units: )

CUMTUR

Cumulative turgor factor that remembers veg drought stress to shift partitioning between leaf and stem toward leaf, especially after drought is released. (units: )

D

Local variable to indicate % available water triggering irrigation. (units: )

DAMSD

Number of seeds which have been damaged by a pod-feeding insect so that they are no longer growing -- zero when only defoliating insects are included, (currently not used in PNUTGRO). (units: )

DAP

Days after planting (units: d)

DASH

Local variable to read - symbol. (units: )

DATE

Date of operation, year & day of year. (units: )

DAYADJ

Day length adjustment amount. (units: d)

DAYFAC

Day length adjustment factor (Addition, Subtraction, Multiplication, Replacement). (units: )

DAYL

Day length on day of simulation (sunrise to sunset). (units: h)

DBAR

Average soil water diffusivity used to calculate upward water flow in top layers.

DD

Soil temperature damping depth (units: mm)

DDLL1

Array containing depth of upper surface of soil layers. (units: )

DDLL2

Array containing depth of lower surface of soil layers. (units: )

DEC

Solar declination or (90-solar elevation at noon). Amplitude= +/-23.45. Minimum=Dec 21, maximum Jun 21/22. (units: deg)

DECL

Declination of sun. (units: )

DEP

The depth of a particular layer of soil which has roots in it at emergence (NVEG0). (units: cm)

DEPIR

Depth of irrigation (units: cm)

DEPMAX

Maximum soil depth where soil water content changes. (units: mm)

DEPTH

Depth to the bottom of a layer from the surface (units: cm)

DETVEG

A switch which allows either indeterminate (0) or determinate (1) leaf area expansion. (units: none)

DHVAR

Physiological days for floral induction if night length is above optimum (TNLG0). (units: )

DIGITS

DISLA

Leaf area which is diseased (currently not used in PNUTGRO). (units: m²/m²)

DISPER

Percent of leaf area which is diseased (currently not used in PNUTGRO). (units: )

DL1

Upper depth of a soil layer. (units: cm)

DL2

Lower depth of a soil layer. (units: cm)

DLAYR

Depth of root layer. (units: cm)

DLAYR

Depth increment of soil layer L. (units: cm)

DLAYR(L)

values are depths to the bottom of layer L. (units: )

dLdT

Daily net change in leaf mass. (units: g/m²/d)

DLFWT

DMOD

Zero to unity factor which reduces the rate constant for mineralization of the humus pool for soils which are poor mineralizers due to chemical or physical protection of the organic matter (default=1). (units: )

DNIT

Number of nights required to accumulate one unit of the night time accumulator at the prevailing night length if temperature is optimum. (units: )

DOY

Day of year (units: d)

DPTFAC

Dew point adjustment factor (Addition, Subtraction, Multiplication, Replacement).

DRAIN

Drainage of water through the bottom of the root zone for a precipitation event. (units: cm)

DRN

DRPP

Rate of photoperiodic progress from GPHEN. Used in pod set. (units: daylength rate)

DS(L)

Values are depths to the bottom. (units: )

DSFILE

Flag indicating whether initial soil water content is read from a file (DSFILE=-1 ) or is assumed equal to the field capacity (DSFILE=1 ). Drainage of water through each layer of soil. (units: )

DSHL

Dry weight added to shells of a given age on day N. (units: g/m²/d)

DSINB

Integral of solar elevation over day (Spitters, 1986). (units: s)

DSINB

Integral of SINB over day (units: s)

DSOIL

Irrigation management depth. (units: m)

DSOILN

dSTdT

Daily change in stem mass. (units: g/m²/d)

DSTEM

Desired stem mass. (units: g/m²/d)

DSTRES

Counter for cumulative days during a given growth phase, used to compute average reduction in turgor or photosynthesis. (units: d)

DSW

Incrementing soil depth for successive soil layers to calculate actual depth (DSWBAR) which affects fruiting. (units: cm)

DSWBAR

Depth of upper soil layers in which soil water deficit is allowed to directly reduce rate of pegging (pod addition). (units: cm)

DT

Difference between moving average soil surface temperature and long-term daily average ambient temperature. (units: )

DTC

Pod detachment thermal time counter. (units: )

DTN

DTT

Number of degree days accumulated in one day (currently not used in PNUTGRO). (units: )

DTX

Number of physiological days accumulated in one day. (units: )

DUL

Drained upper limit soil water content for soil layers. (units: cm³/cm³)

DUMFAC

Ratio of variety specific SLA during vegetative growth to that for standard cultivar. (units: )

DUMMY

X-value for which a Y-value is to be found by interpolation. (units: g/m²/d)

DURNIT

Night length. (units: h)

DWFILE

Temporary weather file name. (units: )

DWLPOS

Increase in leaf weight as a function of gross photosynthate (PG) -- does not include leaf weight lost due to senescence. (units: g/m²/d)

DWPMAX

Maximum growth rate of all seeds present number of growing seeds times temperature dependent growth rate per seed. (units: )

DWPOS

Increase in dry weight of crop per day (not including senescence). (units: g/m²/d)

DX

Number of days for which protein may be mined from leaves, stems, and shells at the maximum rate before protein pools are depleted (currently not used in PNUTGRO). (units: )

DYNAMICS

Switch to determine process calculations. (units: )

EDATE

Ending date in weather file. (units: cm²/g)

EEQ

Equilibrium evapotranspiration used to calculate potential evapotransporation. (units: mm/d)

EFF

Decoded value of irrigation application efficiency returned by subroutine VERIFY. (units: cm/cm)

EFFIRR

Application efficiency of irrigation water. (units: cm/cm)

EFINOC

Inoculation effectiveness (or rhizobium density factor). (units: )

EFNFIX

Strain efficiency (potential growth of nodules). (units: )

EGFT

ELEV

Site elevation above mean sea level. (units: m)

EO

Potential evapotranspiration. (units: mm/d)

EOS

Potential soil evaporation. (units: mm/d)

EP

Actual plant transpiration. (units: mm/d)

EP1

Actual transpiration. (units: cm/d)

ERRKEY

Key string for locating correct error message in ERROR.DAT. (units: )

ERRNUM

Error number in ERROR.DAT under key string. (units: )

ES

Actual soil evaporation. (units: mm/d)

ES1

Actual soil evaporation. (units: cm/d)

ESC

Clearing screen. (units: )

ESW

Extractable soil water content for soil layer I (the difference between drained upper limit (DUL) and lower limit (LL) soil water content. (units: cm³/cm³)

ESX

Temporary soil evaporation variable. (units: mm/d)

ET

Actual soil and plant evaporation. (units: mm/d)

EXLFW

EXPTNO

Ratio of leaf area to leaf weight for leaf tissue which is added on a given day.

F

Specific leaf area for new leaf growth. (units: cm/g leaf tissue)

FAC

FACLIT

Leaf area index at which 63 % of the light is intercepted for the given plant spacing. (units: )

FDEPTH

Fertilizer depth (units: cm)

FFVEG

Specific leaf area (SLA) of new leaves during vegetative growth, after considering the effects of cultivar, temperature, solar radiation, and soil water deficit, based on FVEG. (units: cm²/g)

FILEW

Internal weather file name. (units: )

FINIT

Specific leaf area (SLA) of leaves when plants emerge -- variety specific. (units: cm²/g)

FINREF

Specific leaf area (SLA) of leaves of standard peanut cultivar (Florunner) when plants emerge -- values for other cultivars are calculated in subroutine VARTY. (units: cm²/g)

FLADD

The number of flowers that are developed and available to form pods. Calculated from the variables FLWRDY, TEMPOD, DRPP, SWADD, XFRUIT. (Note: with code re-write, we can delete this variable and use only FLWRDY, KJB). (units: m²)

FLAG

FLAYR

Fraction of next lower soil layer to include in depth of soil in which available soil water is allowed to directly affect rate of pegging (DSWBAR). (units: )

FLDACT

Soil water flooding effect on N2 fixation and nodule growth. (units: )

FLG

FLNO

The total number of flowers actually added per meter square. (units: m²)

FLOW

The amount of soil water flowing upwards near the soil surface. (units: cm/d)

FLWADD

Actual addition of flowers today, depends on the potential rate of flowering. (FLWMAX), today's photosynthesis relative to optimum rate (PMAX is the ratio), temperature (TEMPOD), rate of photoperiodic progress (DRPP), soil water status (SWADD) (*error here. SWADD for old PNUTGRO only which does not add flowers, but adds pegs), and XFRUIT. (units: m²)

FLWFRC

A 0.0 to 1.0 function used to determine the number of flowers that will be available to be converted to pods on a given day. (units: none)

FLWMAX

Potential rate of flowering for a canopy at maximum canopy photosynthesis and if temperature and photoperiod are optimum. Based on input FLWVAR for each genotype. (units: #/m²)

FLWN

The flower number added for cohort J. (units: #/m²)

FLWRDY

The number of flowers that survive NPOD0 photothermal days of all cohorts which can limit pod addition or may be in excess of PODVAR. Filtered through FLADD prior to limiting pod addition. (units: none)

FNINL

Initial fraction of nitrogen in the leaf, a maximum amount. (units: none)

FNINLG

Minimum concentration of nitrogen in the leaf which allows growth at maximum (normal) rate. (units: none)

FNINR

Initial fraction of nitrogen in roots, a maximum amount. (units: none)

FNINRG

Minimum concentration of nitrogen in root organ which allows growth at maximum (normal) rate. (units: none)

FNINS

Initial fraction of nitrogen in stems, a maximum amount. (units: none)

FNINSD

The fraction nitrogen of seed (Genetic input). (units: %, none? )

FNINSG

Minimum concentration of nitrogen in the stem which allows growth at maximum (normal) rate. (units: none)

FNINSH

The fraction nitrogen of shell (parameter file) (units: %, none? )

FNINSH

Initial fraction of nitrogen in the shell, a maximum amount. (units: none)

FOUND

Return code from input routines. (units: )

FRACDN

Fraction of development from beginning bloom (R1) to day on which maximum number of V-stages occur (NDLEAF0 which is completed in a given day). (units: )

FRACDN

Relative time from flowering to last leaf. (units: )

FRDFD

Daily fraction diffuse radiation. Used in the calculation of cloudiness factor (Spitters, 1986). (units: )

FRDFH

Hourly fraction diffuse radiation before correcting for circumsolar radiation (Spitters, 1986). (units: )

FRDIFP

Hourly fraction diffuse photon flux density after correcting for circumsolar radiation (Spitters, 1986). (units: )

FRDIFR

Hourly fraction diffuse solar radiation after correcting for circumsolar radiation (Spitters, 1986). (units: )

FREEZ1

Temperature below which plant is damaged by freezing, leaves are killed.

FREEZ2

Temperature below which all growth stops, plants are killed. (units: )

FREP

Specific leaf area (SLA) of new leaf weight as growth proceeds during reproductive stages. (units: cm²/g)

FREQ

Decoded value of output frequency. (units: )

FRLF

Fraction of total daily increase in growth which will be partitioned to leaves during the current day, as a function of V-stage. (units: none)

FRLFF

Final fraction of daily increase in growth which will be partitioned to leaves after NDLEAF occurs, if there is any carbon left over. (units: none)

FRLFF

Fraction of daily increase in vegetative weight which goes to leaves after the day on which the maximum number of V-stages occurs (NDLEAF). (units: )

FRLFM

Fraction of daily increase in growth which will be partitioned to leaves during reproductive growth (between flowering and maturity). (units: none)

FRLFM

Fraction of daily dry weight increase going to leaves at beginning bloom (R1). (units: )

FRRT

Fraction of total daily increase in growth which will be partitioned to roots during the current day, as a function of V-stage. (units: none)

FRSTM

Fraction of total daily increase in vegetative weight which will be partitioned to stems during the current day, as a function of V-stage. (units: none)

FRSTMF

Final fraction of daily increase in vegetative weight which will be partitioned to stems after the day on which the maximum number of V-stages occurs (NDLEAF), if there is any carbon left over. (units: none)

FRSTMM

Fraction of daily dry weight increase going to stems at beginning bloom (R1). (units: )

FSM

Feeding sight mass or number (amount). (units: )

FSTR

FTYPEN

FVEG

Maximum specific leaf area (SLA) of new leaf weight for a given cultivar during vegetative growth, when grown at optimum temperature, optimum water, and near zero solar radiation. (units: cm²/g)

GAINMN

The calculated maximum gain in leaf weight from the photosynthate available on day N -- photosynthate is reduced if there is insufficient leaf area present to absorb all the weight gain (used prior to V-stage beyond which sink-limited leaf area expansion no longer limits photosynthesis or leaf area growth (VSSINK) to limit leaf growth). (units: )

GAINNW

Leaf area added on day N (used prior to V-stage VSSINK). (units: cm²/m² ground area)

GAINWT

Leaf weight added on day N (used prior to V-stage beyond which sink-limited leaf area expansion no longer limits photosynthesis or leaf area growth (VSSINK) and after the day when the maximum number of V-stages occurs (NDLEAF)). (units: g/m²)

GAMMAL

Concentration of remobilizable protein in leaves that senesce early due to water stress. (units: )

GAMMAR

Concentration of remobilizable protein in roots that senesce. (units: physiological d; presently still integer)

GAMMAS

Concentration of remobilizable protein in petioles that senesce early due to water stress. (units: day of year)

GAMMSH

Concentration of remobilizable protein in shells that senesce early due to abortion. (units: day of year)

GAREA

?? (units: cm²/m²)

GDMSD

Potential seed growth for day. Calculated in subroutine DEMAND. (units: g tissue/m²/d)

GDMSD

Total CH2O demand to grow (units: g tissue)

GDMSDR

Potential seed growth which is possible with the amount of N in NDMSDR

GDMSH

Growth demand for shells. (units: )

GGG

GRF

GROEAR

Daily growth of the ear (units: g)

GROGRN

Daily growth of the grain (units: g)

GROMAX

Maximum leaf area which can be added per plant between emergence and day of simulation as a function of V-stage on day of simulation. (units: cm²/plant)

GROPAN

Daily growth of the pannicle (units: g)

GRORT

New weight of roots on a per plant basis. (units: g/plant/d)

GROSUB

Subroutine that estimates the potential new growth

GROWTH

Increase in dry weight of crop which is due to gross photosynthate (PG), not including senescence. (units: g/m²/d)

GROYES

Maximum leaf area which could have been added per plant between emergence and yesterday as a function of V-stage on day N-1. (units: cm²/plant)

GRRAT1

Potential growth rate per shell under the current temperature and photoperiod. (units: g/d)

GRRAT1

Maximum growth rate per shell as a function of temperature. (units: g/m²/d)

H

Internal hourly counter. (units: h)

HANGL

Hour angle or hourly time step as a proportion of day (+/-PI). (units: rad)

HAREND

Computed harvest date. (units: )

HDATE

Specified day after planting for harvesting. (units: )

HDECAY

Time for hourly temperature exponential decay, from sunset to sunrise+C. (units: h)

HDLAY

Earliest day after harvest maturity (R8). (units: )

HDRFMT

Weather file header format (first line). (units: )

HEARLY

Computed from HDLAY; sets first day of harvest window. (units: )

HI

Pod harvest index, pod as a fraction of shoot mass, 0 to 1.0. (units: day of year)

HLATE

Latest day of the year to harvest; last day of window. (units: )

HLIGHT

Hours of daylight from sunrise to sunset. (units: h)

HOLD

Temporary variable for interchanging values. (units: )

HOLD

The amount of water a soil layer will hold above its present level, used to calculate downward flow. (units: cm)

HPAR

Effect of day's PAR on canopy expansion. (units: )

HS

Inte rnal hourly counter. (units: h)

HST

Specified growth stage for harvesting. (units: )

HSTG

Specified growth stage for harvesting. (units: )

HWDL

Effect of daylength on length of internodes (not used at present). (units: none)

HWPAR

Effect of light on the length of each internode. (units: none)

HWTEM

Effect of temperature on the length of each internode. (units: none)

HWTEM

Effect of temperature on canopy expansion. (units: )

HWTUR

Effect of water stress on the length of each internode. (units: none)

I

Loop counter. (units: none)

I

Convert stem weight to integer. (units: )

IAGE

Days after planting, where IAGE=0 on the day of planting. (units: )

ICOLD

IDRSW

An integer containing information about downward flowing soil water: 0=no downward flow, 1=downward flow. (units: )

IDUMM

Julian date corresponding to a planting date entered by the user from the terminal -- if it lies between proper limits IPLT is reset to planting date (IDUMM). (units: )

IDUMSL

Integer which indicates soil type which is read from soil data file along with soil parameters. (units: )

IDY

Day of month of user-specified calendar date of planting. (units: )

IDYS

Day of month of user-specified calendar date of planting. (units: )

IDYY

Day of month for planting date specified by user from terminal.

IFERI

IFFS

Field observed date of first full sized seed (R6). (units: )

IFFSC

Model computed date of first full sized seed. (units: )

IFLAG

Flag for N source (1=urea; 2=NO3). (units: )

IOFF

IPLTI

Switch for automatic planting, A=automatic. (units: )

ISECT

Indicator of completion of IGNORE (0=End of file encountered; 1=Found a good line to read; 2=End of section in file encountered, denoted by * in column 1. (units: )

ISFLAG

ISWNIT

Nitrogen simulation switch. (units: )

J

Loop counter. (units: none)

JCOUNT

JULD

K

Number of soil water potential value. (units: )

K

Layer and loop counter. (units: none)

KPFLG

L

Loop counter. (units: none)

L

Layer number. (units: none)

LAGSD

Genetic input for length of time from pod initiation and seed growth, for each cohort. (units: photothermal d)

LAGSD

Number of days between start of peg (full flower) and shell formation. Only used in peanut to define slow growth period. (units: )

LAI

Crop leaf area index on current day. (units: )

LAIW

Weed leaf area. (units: m²/m²)

LL

Lower limit (15 atm.) soil water content (units: cm³/cm³)

LNGPEG

Photothermal days that shells are in their slow (lag) growth phase after pod initiation, for each cohort. The early part of LNGSH. Check (KJB). (units: photothermal d)

LNGPEG

Minimum days from start of flowering to last leaf appearance. (units: )

LNGSH

Photothermal days that shells grow (gain weight) after pod initiation, for each cohort. Timing not necessarily tied to LAGSD. (units: photothermal d)

LTOT

Total cumulative leaf mass produced. It is used as a reference for defining defoliation. (units: g/m²)

LUNIO

Logical unit no. for input File X. (units: )

MNEMV1

Minimum days for phenological events under optimum conditions (temperature and short photoperiod). (units: )

MNESPM

Number of days between start of shell and seed formation of a pod. (units: )

MNFLHM

Number of days from end pod set to physiological maturity. (units: )

MNFLLL

Minimum days from emergence to vegetative growth stage 1. (units: )

MON

N

Day counter - begins on day user wishes to start keeping track of soil water content (day of simulation). (units: )

N

The number of days after sowing. (units: none)

NADLF

Nitrogen added to the leaves. (units: g N/m²/d)

NADRAT

Nitrogen addition rate. (units: )

NADRT

Nitrogen added to the roots. (units: g N/m²/d)

NADST

Nitrogen added to the stems. (units: g N/m²/d)

NAGE

The number of calendar days since shell cohort J has been initiated. (units: d)

NAP

Number of irrigation applications. (units: none )

NAPNIT

NAVL

Nitrogen available for seed growth. (units: g N/m²)

NAVL

Nitrogen available for growth. (units: g N/m²/d)

NAVPOD

Nitrogen available for shell growth, after seeds have grown. (units: g N/m²)

NDAY

NDEF1

N defficiency index: the effect of N deficiency on the rate of photosynthesis per unit leaf area.

NDEF2

N defficiency index: the effect of N deficiency on the rate of leaf expansion and leaf senescence

NDEF3

N defficiency index: the effect of N deficiency on tillering

NDEF4

N defficiency index: the effect of N deficiency on the rate of grain N accumulation

NDIF

NDLEAF

Day of simulation which identifies the end of leaf growth. (units: )

NDMNEW

Nitrogen demand for new tissue (vegetative plus reproductive). (units: g N/m²/d)

NDMOLD

Potential nitrogen demand of old vegetative tissue, based on a maximum amount (FNINL, FNINR, FNINS) that can be replenished. (units: g N/m²/d)

NDMREP

Nitrogen demand for reproductive growth, seeds plus shells. (units: g N/m²/d)

NDMSD

N required for seed. (units: )

NDMSDR

Calculate amount of mobilized N which can be used for seed growth

NDMSH

N needed for growth (units: )

NDMTOT

Total nitrogen demand for reproductive, vegetative, new and old tissue. (units: g N/m²/d)

NDMVEG

Nitrogen demand for vegetative growth. (units: g N/m²/d)

NDSET

Last day that flowers can be set. Determined in GPHEN??? May not be needed (KJB) (units: day #)

NDTH

Nodule death rate. (units: )

NFAC

N factor: effect of N availability on plant growth (range 0-1)

NFIXN

Amount of nitrogen fixed. (units: g N/m²/d)

NFXAGE

Average nodule age effect on nodule growth. (units: )

NGRLF

Maximum amount of nitrogen required for new leaf growth based on FNINL (maximum concentration of nitrogen in leaves). (units: g N/m²/d)

NGRLFG

Minimum amount of nitrogen required for new leaf growth based on FNINLG (minimum concentration of nitrogen in leaves). (units: g N/m²/d)

NGRRT

Maximum amount of nitrogen required for new root growth based on FNINR (maximum concentration of nitrogen in roots). (units: g N/m²/d)

NGRRTG

Minimum amount of nitrogen required for new root growth based on FNINRG (minimum concentration of nitrogen in roots). (units: g N/m²/d)

NGRSD

The total nitrogen required to grow the new tissue for all seeds. (units: g N/m²/d)

NGRSH

The total nitrogen required to grow the new tissue for all shells. (units: g N/m²/d)

NGRST

Maximum amount of nitrogen required for new stem growth based on FNINS (maximum concentration of nitrogen in stems). (units: g N/m²/d)

NGRSTG

Minimum amount of nitrogen required for new stem growth based on FNINSG (minimum cooncentration of nitrogen in stems). (units: g N/m²/d)

NGRVEG

Maximum amount of nitrogen required for new vegetative tissue growth. (units: g N/m²/d)

NGRVGG

Minimum amount of nitrogen required for new vegetative tissue growth (G terms). (units: g N/m²/d)

NHWDL

Number of paired values in array describing daylength effect on length of internodes. (Not used at present). (units: none)

NHWPAR

Number of paired values in array describing the effect of PAR on the length of internodes. (units: none)

NHWTEM

Number of paired values in array describing temperature effect on the length of internodes. (units: none)

NHWTUR

Number of paired values in array describing the effect of water stress on the length of internodes. (units: none)

NLAYR

Number of soil layers. (units: none)

NLEFT

The nitrogen left after seed growth and shell growth. (units: g N/m²/d)

NLEFT

Nitrogen left over after new growth has been subtracted. (units: g N/m²/d)

NMINEA

Total nitrogen mined from tissue. (units: g N/m²/d)

NMINEP

Potential nitrogen mining. (units: g N/m²/d)

NMINER

Nitrogen mining rate. (units: )

NMOBMX

Maximum fraction of N that can be mobilized per day. (units: )

NMOBR

Nitrogen mobilization rate. (units: )

NMOBR

Stage-dependent mining rate. (units: )

NODGR

Nodule growth. (units: g/m²/d)

NOUTDO

File handle. (units: none)

NPEST

Number of pests in the pest parameter file. (units: none)

NPLTD

Number of whole plants destroyed. (units: #/m²/d)

NPODO

The number of days after sowing for first pod. Determined in GPHEN. (units: d)

NPOOL

Total amount of N available in the plant for translocation(units: g/plant)

NPOOL1

N in plant shoot that is available for translocation (units: g/plant)

NPOOL2

N in plant roots that is available for translocation(units: g/plant)

NPP

Cohort number (used in do-loops). (units: none)

NR1

The first day of flowering determined in subroutine GPHEN. (units: none)

NR1

Day of simulation when there is at least one open flower at any node on the plant (R1). (units: )

NRATIO

Ratio by which the growth of tissue is restricted due to nitrogen limitation. (units: none)

NRUSLF

Nitrogen mined from the leaves. (units: g N/m²/d)

NRUSRT

Nitrogen mined from the roots. (units: g N/m²/d)

NRUSSH

??? Nitrogen that can be mined from shells. (units: )

NRUSSH

Nitrogen mined from the shells. (units: g N/m²/d)

NRUSST

Nitrogen mined from stems. (units: g N/m²/d)

NSDDL

Number of large seed destroyed. (units: #/m²/d)

NSDDM

Number of mature seed destroyed. (units: #/m²/d)

NSDDS

Number of small seed destroyed. (units: #/m²/d)

NSDR

Plant N supply/demand ratio used to modify grain N content

NSHDL

Number of large shells destroyed. (units: %/d)

NSHDM

Number of mature shells destroyed. (units: #/m²/d)

NSHDS

Number of small shells destroyed. (units: #/m²/d)

NSINK

Demand for N associated with grain filling (units: g/plant/d)

NSINKM

NSINKT

NSLATM

Number of paired values in array which describe the effect of temperature on specific leaf area. (units: none)

NSTRES

Nitrogen stress term, based on supply and demand. (units: none)

NSUM

NSWFAC

The number of data points in the look up function for determining SWADD. (units: none)

NUF

N uptake factor: N demand divided by potential N uptake (range 0-1)

NUP

Upward movement of nitrate in a soil layer

NVEGO

Day of plant emergence (units: d)

NVSHT

Number of paired values in array which describe normal height as a function of V-stage (without any kind of stress.) (units: none)

NVSMOB

Relative N mobilization rate in vegetative stage, relative to reproductive stage. (units: )

NVSPT

NVSWH

Number of paired values in array describing normal width as a function of V-stage (without any kind of stress). (units: none)

NWDC

Number of weed control operations performed. (units: none)

NXFTEM

Number of paired values in array describing temperature effect on partitioning to fruits (XFRUIT). (units: )

NYRCHK

OPME

Method code. (units: )

OPOP

Management option (from management subsection SIMULATION CONTROL). (units: )

OPTY

Operation type. (units: )

OUTN

Nitrate N leaching from a layer (units: kg N/ha)

PAGE

The calculated photothermal days (PHTIM) of shell or seed cohort J. (units: photothermal d)

PAGE

Physiological age of cohort

PANDW

PAR

Daily photosynthetically active radiation or photon flux density, calculated as half the solar radiation (units: MJ/m²). (units: )

PARSLA

Relative effect (0 to 1.0) of daily photosynthetically active radiation on specific leaf area (SLA) of new leaves. (units: none)

PC

PCARB

(potential?) Daily amount of carbon fixed (units: g)

PCLMA

Percent of actual leaf mass (WTLF) destoryed. (units: %)

PCLMT

Percent of total leaf mass (WTLF+senesence) destroyed. (units: % )

PCNL

Current percentage of nitrogen in the leaves. (units: %)

PCNRT

Current percentage of nitrogen in roots. (units: %)

PCNSH

Current percentage of nitrogen in shell. (units: %)

PCNST

Current percentage of nitrogen in stems. (units: %)

PCO2

Photosynthetic response to CO2. (units: )

PCPID

Pest coupling point identification code. (units: )

PCSTMD

Desired cumulative percent stem mass destroyed. (units: % )

PCTID

Pest curve type identification code. (units: )

PCTMAT

The fraction of pods that are mature (seed are 90% of final size), used for PNUTGRO. (units: none)

PDCF1

Pest damage coefficient for pest curve. (units: )

PDLA

Percent diseased leaf area. (units: %)

PDLA

Diseased leaf area (see also TDLA). (units: )

PDW1

Potential growth of plant tops

PGAVL

The available carbohydrate for plant growth. (units: g CH2O/m²/d)

PGAVLR

The available carbohydrate for reproductive growth (Used for peanuts), works for bean and soybean if XFRT = 1.0. (units: g CH2O/m²/d)

PGLEFT

The carbohydrate left after seed and shell growth. (units: g CH2O/m²)

PGLEFT

Amount of gross photosynthate (PG) left to be used in synthesis of remaining plant tissues. (units: g CH2O/m²/d)

PGNPOD

Carbohydrate available for pod growth, after seed growth. (units: g CH2O/m²)

PGRORT

Potential root growth

PHTHRS

From parameter file that determines the period that allows flower in the cohort to make pods. (units: photothermal d)

PHTIM

Stores the cumulative photothermal time ages of seeds and shells. (units: none)

PID

Pest identification header. (units: )

PL

Pest level from pest progress file. (units: )

PLAGMS

PLAGT

PLAIW

Percent weed leaf area, laiw/(laiw+lai crop). (units: %)

PLALR

PLAS

The rate of senescence of leaf area on one plant (units: cm²/d)

PLATN

PLFAD

Percent leaf area damaged. (units: %/d)

PLFMD

Percent leaf mass destroyed. (units: %/d)

PLTPOP

Number of plants per meter square. (units: )

PMAX

Ratio set in PHOTO subroutine, that expresses today's photosynthesis rate as a ratio of the maximum photosynthetic rate if under optimal canopy size, temperature, light and photosynthesis conditions. (units: none)

PNTIM

Stores the cumulative photothermal days (PTD) for flowers. (units: none)

PODADD

Actual number of pods that can be added to crop on day J. Calculated from the variables PODVAR, PMAX, TEMPOD, DRPP, SWADD, and XFRUIT, which set genetic, photosynthetic, temperature, photoperiod, soil water, and partitioning limits, respectively. (units: #/m²)

PODMAT

The number of mature pods, in which pod cavities are filled . Summed over individual cohorts if weight per seed exceeds 90% of SDMAXX (maximum possible size of seed). For PNUTGRO. (units: g/m²)

PODNO

Total number of all pods per meter square. Goes to output. (units: m²)

PODSUM

The total weight of the pods and seeds. Goes to output. (units: g/m²)

PODVAR

The potential rate of pod addition for a given cultivar at maximum photosynthesis and optimum temperature, photoperiod, and soil water conditions. A genetic input. (units: #/m²/d)

PODWT

Weight of pods. (units: g/m²)

PORMIN

Minimum pore space required for supplying oxygen to roots for optimal growth and function. (units: )

PP3

PPLTD

Percent of whole plants destroyed. (units: %/m²/d)

PPSR

Percent photosynthesis reduction. (units: %)

PRECIP

Precipitation for the current day (units: mm)

PRFT

Photosynthetic reduction factor for temperatures below 20 or above 40 ^oC. (units: )

PROF

Proportion of soil destined fertilizer. (units: )

PROLFF

Proportion of proteins in leaves at the end of the season, after all possible nitrogen has been translocated to seeds. (units: none)

PROLFG

Protein content of the leaves at the lowest level that growth can continue without any kind of stress. (units: none)

PROLFI

Initial proportion of protein in new leaf tissue, at luxury level growth. (units: none)

PROLFT

Amount of protein which can be remobilized from leaves, stems, and shells today for which there is no CH2O available to make seed at a respiratory cost of AGRSD2 (glucose recquired to produce one unit of seed when protein is available through mining) -- this can be used for energy, carbon skeletons, and protein at the rate of 0.68 g seed/g protein. (units: g/m²/d)

PRORTG

Protein content of the leaves at the lowest level that growth can continue without any kind of stress. (units: none)

PRORTI

Initial proportion of protein in new root tissue. (units: none)

PROSHI

Fraction protein of the shells when first produced. (units: none)

PROSTF

Proportion of protein in stems at the end of the season, after all possible nitrogen has been translocated to seeds. (units: none)

PROSTG

Protein content of the stem at the lowest level that growth can continue without any kind of stress. (units: none)

PROSTI

Initial proportion of protein in new leaf tissue (units: none)

PRTLF

Percent of root flux (cm/m²) destroyed. (units: %/d)

PRTLV

Percent of root length density destroyed. (units: %/d)

PRTMD

Percent of root mass destroyed. (units: %/d)

PSDDL

Percent of seed destroyed that are large. (units: %/d)

PSDDM

Percent of seed destroyed that are mature. (units: %/d)

PSDDS

Percent of seed destroyed that are small. (units: %/d)

PSHDL

Percent of shells destroyed that contain large seed. (units: %/d)

PSHDM

Percent of shells destroyed that contain mature seed. (units: %/d)

PSHDS

Percent of shells destroyed that contain small seed. (units: %/d)

PSTHD

Column headers from each pest progress curve.

PSTMD

Percent of stem mass destroyed. (units: g/m²/d)

PTTN

Minimum soil temperature limits (units: ^oC)

PTX

Maximum soil temperature limits (units: ^oC)

PUNCSD

PUNCTR

PWDINF

First day of year for planting window. (units: )

PWDINL

Last day of year for planting window. (units: )

RAMT

Amount of material resource produced. (units: )

RANC

Root actual N concentration (units: g [N] / g [DM])

RATIO

RCANHT

Rate of height growth on current day. (units: )

RCANWH

Rate of width growth on current day. (units: )

RCH2O

Respiration cost for storing carbohydrates (units: none)

RCNP

Root critical N concentration (units: g [N] / g [DW]). If RANC > RCNP, no extra growth occurs.

RDOY

REDPUN

The fraction reduction in seed growth due to insect puncture (0-1.0) (units: none)

REDSHL

We should have the amount of protein mass lost from each shell cohort. KJB can not decipher from code. WB help is needed, because shelling % can exceed genetic limits if we do not account for this. (units: g/m²)

RFAC

Root factor: the combined effect on N uptake of root length density RLV, soil water factor SMDFR and depth of the layer (range 0-1)

RFAC2

Maximum increase in root depth per physiological day if there is no water stress. (units: cm/physiological d)

RFLWAB

Maximum relative rate of flower abortion per day if nightlength is not optimum or if there is no available soil water in the pegging zone. Latter for peanut only. (0.0-1.0) (units: none)

RGFILL

Rate of grain fill (units: mg/d)

RHGHT

Genetic coefficient to allow description of height reference cultivars. (units: )

RL

Canopy resistance factor. (units: )

RLC

Canopy resistance factor. (units: )

RLDF

A root length density factor for soil layer L used to new root growth distribution. (units: none)

RLF

Leaf stomatal resistance at 330.0 ppm CO2 (units: s/m)

RLFC

Leaf stomatal resistance at other CO2 conc. (units: s/m)

RLFDOT

Daily root length flux damage (units: cm root / cm² ground)

RLNEW

New root length to be added to the total root system length (units: cm root/cm² ground)

RLV

Root length density (units: cm [root] / cm³ [soil])

RMNC

Root minimum nitrogen concentration (units: g N/g root dry weight)

RMON

RNAM

Type of material resource involved (none for tillage). (units: )

RNAME

RNFAC

Zero to unity factor describing mineral N availability effect on root growth in layer L. (units: none)

RNH4

Ammonium uptake (units: kg N/ha)

RNLAB

RNLF

Intermediate factor (range: 0-1) used to calculate distribution of new growth in the soil. (units: none)

RNO3C

Respiration requirement to take up nitrogen and reduce it to amino acid, on a protein basis. (units: none)

RNO3U

Nitrate uptake (units: kg N/ha)

RNOUT

ROWSPC

Spacing between adjacent rows of soybeans. (units: m)

RPROAV

Respiration cost for synthesizing protein which will go into vegetative tissue. (units: none)

RPRPUN

RSD

Calculated ratio of supply to demand for seed growth. Available carbon and nitrogen considered. (units: none)

RTEXF

Fraction root death per day under oxygen depleted soil when soil is completely saturated. (units: )

RTNH4

Ammonium uptake per unit root length (units: mg N/cm)

RTNO3

Nitrate uptake per unit root length (units: mg N/cm)

RTR

RTSURV

Fraction survival of roots on a given day, taking into account death due to excess or deficit water conditions. (units: )

RTSW

Weight of an average stem plus ear relative to a potential stem plus ear. (units: )

RTWT

Total weight of roots (units: g/m²)

RUNT

Units for material resource. (units: )

RVSTGE

Rate of vegetative stage progression. (units: )

RWIDTH

Genetic coefficient to allow description of width of reference cultivars. (units: )

S0N

Normal (perp.) extra-terrestial radiation (set equal to average solar constant; elliptical orbit ignored). (units: )

SAT

Saturated soil water content in layer L (units: cm³/cm³)

SATFAC

Root length weighted soil water excess stress factor (0=no stress; 1=saturated stress ). (units: )

SCLEAR

Clear sky radiation (units: MJ)

SDDES

Number of seed destroyed in each cohort by pests. (units: #/m²)

SDGR

Potential seed growth rate per seed as determined by temperature, photoperiod, and disease set in DEMAND subroutine, also based on genetic input of a cultivar. (units: )

SDIDOT

Number of seed destroyed by pests. (units: #/m²/d)

SDMAX

The maximum dry weight gain left for each seed until it fills the shell. Computed for each cohort, depends on THRESH, WTSHE(NPP), WTSD(NPP), and REDSHL (units: g/seed?)

SDMAXX

Maximum possible seed weight for a given pod weight. Check for each pod cohort depends on THRESH, WTSHE(NPP), and protein lost from the shell (REDSHL). (units: g/seed?)

SDNO

The number of seeds in cohort J. Seed number is determined initially from SHELN (NPP), SDPDVR, DRPP, AVTEM, SHRAT. (units: #/m²)

SDPDVR

The genetic parameter for potential seed number per pod. (units: #/pod)

SDSUM

Total weight of seeds per meter square. Goes to output. (units: g/m²)

SDVAR

Compute reproductive rates from cultivar and ecotype coefficients. (units: )

SDWT

Total weight of all seeds. (units: g/m²)

SDWTPL

Initial planting material dry weight (units: kg/ha)

SEEDNO

Total number of seed per meter square. Goes to output. (units: #/m²)

SETMAX

Cumulative ratio of supply to demand for a given cohort of shells, below which a fraction of shells (and seeds) are aborted in proportion to the ratio (1-SHRAT). (In parameter file) (units: none)

SFAC

SHELN

The number of shells in cohort J. Shell number is determined initially from the minimum of the ratios PODADD, PGNPOD/SHMAXG*AGRSH1, FLADD, and NAVPOD/SHMAXG*FNINSH. (units: #/m²)

SHELWT

???????? Maximum shell weight of mature pod??? (units: g tissue/m²)

SHELWT

Total weight of all shells. (units: g/m²)

SHLSUM

Total weight of shells per meter square. Goes to output. (units: g/m²)

SHMAXG

The maximum growth rate per shell. Calculated from genetic input SHVAR. Note from KJB. Why use it instead of GRRAT1? Such a nitpicky difference. Acts only for a few cohorts. (units: g tissue /shell/d)

SHMINE

Protein mass mined from shell tissue for seed growth. (units: g shell tissue/m²)

SHRAT

The supply:demand ratio for pod abortion. (units: )

SHTHIC

Fraction of potential shell growth rate that can occur after shells are fully expanded and beyond the LNGSH phase. Used only for PNUTGRO. Secondary thickening as protein is mobilized. Does this really work much if seed have first priority? (units: none)

SHVAR

Potential rate of dry matter accumulation per shell at optimum assimilate supply, temperatures, photoperiod, and water status. (units: ? /shell)

SKERWT

Weight of a single kernel (units: g)

SKGN

SLA

Specific leaf area. (units: cm²/g)

SLAMN

The minimum specific leaf area (SLA) for new peanut leaves when grown under infinitely high radiation, optimum water and temperature for variety I, modified in VARTY. (units: cm²/g)

SLAMX

The maximum specific leaf area (SLA) for new peanut leaves when grown under low (nearly zero) radiation but optimum water and temperature for variety I, modified in the subroutine VARTY. (units: cm²/g)

SLAPAR

SLDOT

Daily leaf mass senesenced. (units: g/m²/d)

SLFC

SLFT

SLFW

SMC(L,K)

Soil water resease point, layer L, SWP K (units: cm³/cm³)

SMDFR

Relative drought factor. (units: )

SMDFR

Soil water factor which reduces potential plant uptake of water (range 0-1). Lower values near saturation because of anaerobiosis and reduced root function.

SN1

SNACT

Specific nodule activity. (units: )

SNACTM

Maximum activity of the nodules. (units: )

SNDN

Sunset. (units: )

SNUP

Sunrise. (units: )

SOC

Sun angles (limited for latitudes above polar circles). (units: )

SOILNC

SOILNX

SPPM

SRDOT

Daily senescence of roots. (units: g/m²/d)

SSDOT

Daily senescence of petioles. (units: g/m²/d)

START

Set equal to initial shell number (non-aborted number) when shell number is being reduced because of low supply/demand ratio, for a given cohort. (units: #/m²)

STMTOT

Total cumulative stem mass produced. (units: g/m²)

STMTOT

Total stem mass before damage. (units: )

STMWT

Total stem weight. (units: g/m²)

STNAME(I)

Defines names of reproductive phases. (units: )

SUMEX

Sum over all layers of water excess factor times depth times root length density. (units: )

SUMRL

Sum of root length density (integral over depth). (units: )

SUPDAY

Today's ratio of minimum of carbohydrate supply to C demand or N supply to N demand, computed for each cohort of shells from formation through the LAGSD phase to determine fraction of shells and seeds to add in that cohort. Computed in order of age, so SUPDAY could be 1.0 for first shells and 0.0 for youngest. (units: none)

SUPDE

The cumulative average supply-demand ratio (for both C and N) for shells formed on day J. (units: none)

SUPPN

Total supply of nitrogen, based on fixation uptake and mining. (units: g N/m²/d)

SW

Actual soil water content in layer L. (units: cm³/cm³)

SWADD

Determined from a look up function using the variables YSWFAC, XSWFAC, TURFAC, NSWFAC for the determination of pegging zone soil water effect on the addition of pegs.... supposed to be only for PNUTGRO. Supposed to be SWFAC. Re-think this for bean and soybean. KJB. (units: none)

SWDF

Soil water deficit factor (range 0-1) for layer L used to calculate root growth and water uptake. (units: )

SWDF2

Drought stress

SWEF

Soil water evaporation fraction. The fraction of the LL water content that determines the lowest possible value that the top soil layer water content can reach by soil evaporation. The value depends on the depth of the first layer. (units: )

SWFAC

Ratio of root water uptake to potential climatic evaporative demand. Should be used in the tabex function for determining SWADD. (units: none)

SWFAC

Soil water stress factor. (units: )

SWFACT

Soil water deficit effect on N2 fixation and nodule growth. (units: )

SWIDOT

Dry weight of seeds lost due to damage by insects on the current day of simulation (currently not used in PNUTGRO). (units: g/m²/d)

SWP(K)

Soil water potential value for SMC curve (units: cm)

SWPLTD

Depth to which average soil moisture is determined (units: cm)

SWPLTH

Upper limits on soil moisture (units: %)

SWPLTL

Lower limits on soil moisture (units: %)

TA

TAIRHR

Hourly air temperature. (units: ^oC)

Tb(L)

Bubbling pressure for soil, layer L (units: cm)

TC1

TC2

TCNP

Critical N concentration in plant tops (units: g [N] / g [DW]). If TANC > TCNP, no extra growth occurs.

TDEPTH

Root zone depth

TDLA

Absolute daily percent diseased leaf area. (units: m²/m²)

TDLA

Diseased leaf area (see also PDLA). (units: )

TDRAIN

TDUMX2

The rate of photothermal progress calculated in GPHEN, both temperature and photoperiod dependent. Check it again after resolving GPHEN. (units: )

TEMPMN

Mean temperature

TEMPOD

Effect of temperature on rate of flower, shell, and seed addition based in part on the Borthwich and Parker data, with lower cut off based on Raper and Thomas. Relative rate between 0.0 and 1.0. KJB. Rethink this. (units: none)

TEMXFR

Effect of temperature on partitioning to fruits (XFRUIT), 0 to 1.0. (units: )

TFAC

THRESH

The maximum ratio (seed/(seed+pod)) at maturity. Determines the maximum dry weight gain by seeds until seed fill shell. A genetic input. (units: none)

TI

Fraction of a phyllochron interval which occurred as a of today's daily thermal time. (units: )

TLCH

TLFAD

Total leaf area damaged. (units: cm²/cm²/d)

TLFMD

Total leaf mass destroyed. (units: g/m²/d)

TLG

TMAX

Maximum temperature of the day. (units: ^oC)

TMIN

Minimum temper ature of the day. (units: ^oC)

TMINER

TNFIX

Soil T effect on N2 fixation. (units: )

TNGRO

Soil T effect on nodule growth. (units: )

TNLAB

TNOLD

TNOX

TOPWT

Weight of leaves, stems, and pods. (units: g/m²)

TOTIR

Total irrigation (units: mm)

TOTWT

Total weight of all plant components. (units: g/m²)

TPHFAC

Reduction in photosynthesis due to daytime temperature being less than optimal, factor between 0 and 1. (units: )

TPHFAC

Reduction in specific leaf area (SLA) due to 24-hour temperature being less than optimal, factor between 0 and 1. (units: )

TPSR

Total Photosynthesis reduction. (units: g/m²/d)

TRLDF

An intermediate calculation used to calculate distribution of new root growth in soil. (units: )

TRLV

Total root length volume. (units: )

TRNU

Potential N uptake from the whole profile

TRNU

Total nitrogen uptake. (units: g N/m²/d)

TRNU

Potential N uptake in soil layers with roots. (units: )

TRTLF

Total root flux (cm/m²) destroyed. (units: cm/cm²/d)

TRTLV

Total root length density destroyed. (units: cm/cm³/d)

TRUNOF

TSDEP

Computed soil temperature to 10 cm depth. (units: ^oC)

TSDNO

Total seed number in all cohorts. (units: #/m²)

TSDWT

Total seed mass in all cohorts. (units: g/m²)

TSHNO

Total shell number in all cohorts. (units: #/m²)

TSHWT

Total shell mass in all cohorts. (units: g/m²)

TSIN

TSOC

TSON

TT

TTMP

TURFAC

Used in the tabex function for determining SWADD. Should use SWFAC. KJB. (units: none)

TURFAC

Factor which reduces leaf expansion as a function of water stress. TURFAC also affects partitioning and leaf abscission. (units: )

TURSEN

Constant which describes the exponential shape of shift in partitioning to fruits versus the ratio of soil-root water supply to actual plant transpirative demand (currently not used in PNUTGRO). (units: )

TURSLA

Turgor effect on specific leaf area. (units: none)

VANC

Actual N concentration in vegetative plant parts (units: g [N] / [plant])

VGRDEM

Vegetative tissue growth demand after seeds and pods are grown. (units: g/m²/d)

VMNC

Minimum N concentration in vegetative plant parts (units: g [N] / g [DW])

VNDEM

Demand of nitrogen for growth of vegetative tissue (leaf, stem, root) at a certain partitioning level. (units: g N/m²/d)

VSSINK

Vegetative stage beyond which sink-limited leaf area expansion can no longer limit photosynthesis or leaf area growth. (units: )

VSTAGE

Vegetative stage of growth (number of nodes on mainstem). (units: )

W1

WC

Moisture content affect on soil temperature. (units: )

WCRLF

Weight of carbon reserves in the leaves. (units: g CH2O/m²/d)

WCRRT

Weight of carbon reserves in the roots. (units: g CH2O/m²/d)

WCRSH

Weight of carbon reserves in shells. (units: g CH2O/m²/d)

WCRST

Weight of carbon reserves in stems. (units: g CH2O/m²/d)

WDHT

Weed height on current day (units: m)

WDOT

Change in dry weight of crop. (units: g/m²/d)

WDSIZ

Weed height when operation was performed (units: m)

WEFFIC

Efficacy of weed control operation (units: %)

WIND2

Windspeed to 2 m reference height.

WLDOT

Change in dry weight of leaves. (units: g/m²/d)

WLDOTN

Actual rate of new leaf growth. (units: g/m²/d)

WLIDOT

Dry weight of leaves eaten by insects on a given day, or frozen by low temperature (and thus removed). (units: g/m²/d)

WNDOT

Change in dry weight of nodules. (units: g/m²/d)

WPDOT

Change in dry weight of pods (seeds + shells). (units: g/m²/d)

WRDOT

Change in dry weight of roots. (units: g/m²/d)

WRDOTN

Actual rate of new root growth. (units: g/m²/d)

WRIDOT

Daily root mass destroyed due to pest damage (units: g/m²/d)

WRTMD

Weight of roots destroyed. (units: g/m²/d)

WSDDL

Weight of large seed destroyed. (units: g/m²/d)

WSDDM

Weight of mature seed destroyed. (units: g/m²/d)

WSDDOT

Change in dry weight of seeds per day. (units: g/m²/d)

WSDDS

Weight of small seed destroyed. (units: g/m²/d)

WSDDTN

Actual rate of new seed growth. (units: g/m²/d)

WSDOT

Change in dry weight of stems. (units: g/m²/d)

WSDOTN

Actual rate of new stem growth. (units: g/m²/d)

WSHDL

Weight of shells destroyed that contain large seed. (units: g/m²/d)

WSHDM

Weight of shells destroyed that contain mature seed. (units: g/m²/d)

WSHDOT

Change in dry weight of shells per day. (units: g/m²/d)

WSHDS

Weight of shells destroyed that contain small seed. (units: g/m²/d)

WSHDTN

Actual rate of new shell growth. (units: g/m²/d)

WSHIDT

Dry weight of shells lost due to abortion due to insect damage on the current day of simulation (currently not used in PNUTGRO) (units: g/m²/d)

WSHIDT

Total shell mass destroyed by pests. (units: g/m²/d)

WSIDOT

Daily change in stem dry mass due to pest damage. (units: g/m²/d)

WSTMD

Weight of stem mass destroyed. (units: g/m²/d)

WSTR

WTABR

Weight of aborted pods for shell cohort J. (units: g tissue/m²)

WTABRT

Total mass of shells aborted on a given date due to inadequate assimilate supply or temperature. (units: g/m²)

WTHADJ

Weather modification array (2x8) containing offset and multiplier for each variable (1=DAYL, 2=SRAD, 3=TMAX, 4=TMIN, 5=RAIN, 6=RH, 7=WIND, 8=CO2). (units: )

WTLF

Total leaf weight, a state variable. (units: g/m²/d)

WTNALL

Sum of all N that accumulated in all plant components. (units: g/m²)

WTNHAR

Sum of N in all plant components at harvest. (units: g/m²)

WTNLA

All of the N that entered leaves. (units: g/m²)

WTNLF

N present at harvest in leaves. (units: g/m²)

WTNLO

N lost due to senescence of leaves. (units: g/m²)

WTNNA

All of the N that entered nodules. (units: g/m²)

WTNNAG

WTNNO

N lost due to senescence of nodules. (units: g/m²)

WTNNOD

N present at harvest in nodules. (units: g/m²)

WTNOFF

Sum of N in all plant components that senesced (units: g/m²)

WTNRA

All of the N that entered roots (units: g/m²)

WTNRO

N lost due to senescence of roots (units: g/m²)

WTNRT

N present at harvest in roots (units: g/m²)

WTNSA

All of the N that entered stems (units: g/m²)

WTNSD

N present at harvest in seed (units: g/m²)

WTNSDA

All of the N that entered seeds (units: g/m²)

WTNSDO

N lost due to senescence of seed (units: g/m²)

WTNSH

N present at harvest in shell (units: g/m²)

WTNSHA

All of the N that entered shell (units: g/m²)

WTNSHO

N lost due to senescence of shell (units: g/m²)

WTNSO

N lost due to senescence of stems (units: g/m²)

WTNST

N present at harvest in stems (units: g/m²)

WTSD

The seed weight for cohort J. (units: g tissue/m²)

WTSHDTN

Total shell weight added for a given day. (units: g tissue/m²/d)

WTSHE

The shell weight for cohort J. (units: g tissue/m²)

WTSHM

The weight of mature or full shells. (units: g tissue/m²)

WTSHMT

The weight of shells that have reached THRESH (seed filled pod) today. (units: g tissue/m²)

WTSHMY

Yesterday's weight of mature or full shells. (units: g tissue/m²)

XFRMAX

Maximum increase in partitioning to fruit under severe water stress. (does not apply for soybean, peanut or bean?) (units: none)

XFRT

Internal use, set by XFRUIT, maximum partitioning of dry matter for seed growth. (units: %)

XFRT

Current day's partitioning into reproductive growth, based on a genetic coefficient--XFRUIT. (units: none)

XFRUIT

Maximum partitioning of dry matter for seed growth. Variable equals 1.00 except for peanuts. (units: %)

XFRUIT

Genetic coefficient that quantifies a specific variety's maximum partitioning of photosynthates to reproductive growth. (units: none)

XHWDL

Should represent the effect of day length on length of internodes (not used at present). (units: )

XHWPAR

Array of photosynthetically active radiation values describing the effects of PAR on length of internodes. (units: mol/m²/d)

XHWTEM

Array of temperature values in temperature look up table which describe the effect of temperature on the length of internodes. (units: ^oC)

XHWTUR

Array of relative values of water stress which describe the effect of turgor on extension (values of 0 to 1.0). (units: none)

XI

Non-integer Julian date. (units: )

XLEAF

V-stage at which partitioning to leaves is YLEAF(I). (units: )

XLFWT

XMIN

XNF

XRTFAC

V-stage at which rate of increase in root depth per physiological day is YRTFAC(I) -- constant rate throughout the season now. (units: )

XSLATM

Array of temperature values in table look up describing the effect of temperature on specific leaf area. (units: ^oC)

XSTEM

V-stage at which partitioning to stems is YSTEM(I). (units: )

XSWFAC

Used in the tabex function for determining SWADD. (units: none)

XTN

XVGROW

V-stage by which maximum leaf area growth per plant since emergence is YVGROW(I). (units: )

XVSHT

Array of V-stage progression which describes the normal height of a variety. (units: )

XVSWH

Array of V-stage progression which describes the normal width of a variety. (units: )

XX

Difference between partitioning fraction to stems at beginning bloom (R1) and at the day on which the maximum number of V-stages occurs (NDLEAF). (units: )

XXFTEM

Array of temperature values in table lookup describing effect of temperature on partitioning to pods (YXFTEM = 0 TO 1). (units: ^oC)

Y1

Temporary variable used in calculation of PCARB. (units: )

YHWDL

Should represent the effect of daylength on length of internodes (not used at present). (units: )

YHWPAR

Array which describes the inverse relation between PAR and length of internodes. (units: none)

YHWTEM

Array which describes the decrease in length of internodes as temperatures are cooler. (units: none)

YHWTUR

Array which describes the decrease in length of internodes as water shortage increases. (units: none)

YLEAF

Partitioning fraction to leaves at V-stage XLEAF(I). (units: )

YRDOY

Day of year. (units: )

YRPLT

Computed planting date. (units: )

YRTFAC

Rate of increase in root depth per degree day at V-stage XRTFAC(I). (units: )

YSLATM

Array which describes the effect of temperature on specific leaf area. (units: )

YSTEM

Partitioning factor for stem growth at V-stage XSTEM(I). (units: )

YSWFAC

Used in the tabex function for determining SWADD. (units: none)

YVGROW

Maximum leaf area grown per plant by V-stage XVGROW(I). (units: cm²/plant)

YVSHT

Array of V-stage progression which describes the normal height of a variety. (units: )

YVSWH

Array of V-stage progression which describes the normal width of a variety. (units: )

YXFTEM

Array which describes the effect of temperature on relative partitioning to pods. (units: oC)

YY

Internal variable used to linearly interpolate the difference in partitioning to leaves between stages R1 and NDLEAF. (units: none)

ZD

Variable used in the calculation of soil temperature. (units: )