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Date: | Mon, 18 Feb 2002 15:40:31 -0500 |
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Hello Everyone,
I received a question from a fellow DSSAT user that I could not answer. In
short he was asking why when he runs a legume experiment with the N switch
turned off he still sees N stress.
I ran the first treatment (no H2O or N stress) of IUCA experiment that came
with DSSAT and confirmed that this phenomenon occurred.
Does anyone know the reason for this?
Thank you in advance.
Brian
*SIMULATION OVERVIEW FILE
*RUN 1 : 0.25m ROW, NO WATER STRES
MODEL : CRGRO980 - SOYBEAN
EXPERIMENT : IUCA7901 SB WAYNE, IRRIGATED &
NON-IRRIGATED
TREATMENT 1 : 0.25m ROW, NO WATER STRES
CROP : SOYBEAN CULTIVAR : WAYNE (3) - MATURITY
GROUP 3
STARTING DATE : MAY 15 1979
PLANTING DATE : MAY 15 1979 PLANTS/m2 : 16.0 ROW SPACING : 25.cm
WEATHER : IUCA 1979
SOIL : IBSB910026 TEXTURE : -99 - Ida Silt Loam
WATER BALANCE : NOT SIMULATED ; NO H2O-STRESS
IRRIGATION :
NITROGEN BAL. : NOT SIMULATED ; NO N-STRESS
N-FERTILIZER :
RESIDUE/MANURE :
ENVIRONM. OPT. : DAYL= .00 SRAD= .00 TMAX= .00 TMIN= .00
RAIN= .00 CO2 = R330.00 DEW = .00 WIND= .00
SIMULATION OPT : WATER :N NITROGEN:N N-FIX:N PESTS :N PHOTO :L ET :R
MANAGEMENT OPT : PLANTING:R IRRIG :N FERT :N RESIDUE:N HARVEST:M WTH:M
*SUMMARY OF SOIL AND GENETIC INPUT PARAMETERS
SOYBEAN CULTIVAR :IB0003-WAYNE (3) ECOTYPE :SB0301-MATURITY
GROUP 3
CSDVAR :13.45 PPSEN : .25 EMG-FLW:19.50 FLW-FSD:14.80 FSD-PHM :28.00
WTPSD : .180 SDPDVR : 2.20 SDFDUR :21.00 PODDUR :14.00 XFRUIT : 1.00
*SIMULATED CROP AND SOIL STATUS AT MAIN DEVELOPMENT STAGES
RUN NO. 1 0.25m ROW, NO WATER STRES
DATE CROP GROWTH BIOMASS LAI LEAF ET RAIN IRRIG SWATER
CROP N STRESS
AGE STAGE kg/ha NUM. mm mm mm mm kg/ha
% H2O N
--------------------------------------------------------------------------------
15 MAY 0 Start Sim 0 .00 .0 0 0 0 0 0 .0
.00 .00
15 MAY 0 Sowing 0 .00 .0 0 0 0 0 0 .0
.00 .00
28 MAY 13 Emergence 8 .01 .0 0 0 0 0 0 5.1
.00 .08
28 MAY 13 End Juven. 8 .01 .0 0 0 0 0 0 5.1
.00 .08
7 JUN 23 Unifoliate 16 .03 1.2 0 0 0 0 1 4.8
.00 .47
10 JUN 26 Flower Ind 21 .04 1.6 0 0 0 0 1 4.8
.00 .03
13 JUL 59 First Flwr 1301 2.22 9.3 0 0 0 0 52 4.0
.00 .00
28 JUL 74 First Pod 3652 4.62 13.0 0 0 0 0 133 3.6
.00 .00
9 AUG 86 First Seed 5665 5.46 16.2 0 0 0 0 194 3.4
.00 .00
21 AUG 98 End Pod 6807 4.80 18.6 0 0 0 0 226 3.3
.00 .00
26 AUG 103 End Msnode 7373 4.46 19.4 0 0 0 0 241 3.3
.00 .00
26 AUG 103 End Leaf 7373 4.46 19.4 0 0 0 0 241 3.3
.00 .00
10 SEP 118 Phys. Mat 8814 3.42 19.4 0 0 0 0 300 3.4
.00 .00
22 SEP 130 Harv. Mat 7115 .22 19.4 0 0 0 0 265 3.7
.00 .00
22 SEP 130 Harvest 7115 .22 19.4 0 0 0 0 265 3.7
.00 .00
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