A field experiment was conducted at research farm of Indian Agricultural Research Institute, New Delhi during Rabi 2016-17 and 2017-18. Three varieties of mustard [Brassica juncea (L.) Czern and Coss] RH-406, P. Tarak and Girraj were sown on three different dates for generating different weather conditions during different growth stages. InfoCrop-mustard model was calibrated from the observation taken from rabi 2016-17 sown mustard crop of same variety under same treatment. Model validation was done from the observation taken during Rabi 2017-18 sown crops under similar treatments. Simulation of phenology, LAI, biomass and seed yield was done by the InfoCrop-mustard model for RH-406, P. Tarak and Girraj cultivar of mustard sown at IARI, New Delhi research farm. Simulation of LAI, biomass and seed yield was done by the InfoCrop-mustard for RH-406 and Girraj cultivar of mustard in the farmer's field. Biomass and seed yield estimation was done by InfoCrop-mustard model for rabi 2017-18 crops at anthesis and at pod formation stage. Results showed that Infocrop-mustard model could able to simulate growth, development and yield of mustard crop. The mustard biomass and yield estimation done by the InfoCrop at pod formation stage had more promising results than at anthesis stage. We conclude that InfoCrop-mustard model satisfactorily simulate the growth, development and yield of mustard crop at farmer's field, and hence can be applied for agricultural applications for farmer's field and multistage mustard yield estimation.
For generating different weather conditions during various phenological stages, experiments were conducted on two varieties of wheat (HD-2967 and HD-3086) sown on three different dates at the research farm of IARI, New Delhi during rabi 2015-16 and 2016-17. Soil temperature, soil moisture, leaf area index, biomass, chlorophyll content, radiation interceptions were measured during different crop growth stages. Number of days taken for each phenological stage was observed and thermal time for different phenological stages were calculated. Results showed that first sown crop had higher value of crop growth parameters and yield as compared to second and third sown crop.HD-3086 had higher value of LAI, biomass and yield than HD-2967. Grain yield had significant positive correlation with growing degree days during grain filling stage. Soil temperature measured at 2.21 PMat 5, 10, 15, 20 cm depth had 1-5°C lower value than the air temperature. Soil moisture measured at 0-15, 15-30, 30-45 and 45-60 cm depths had slightly higher soil moisture for HD-3086 as compared to corresponding value in HD-2967 during emergence, flowering and grain filling stages. Percentage relative water content in HD-2967 was found to be higher in first sown crop followed by second and third sown crop. However, in HD-3086, percentage relative water content was found to be higher in first sown crop followed by third and second sown crop. Grain yield had significant positive correlation with relative water content during different phenological stages. HD-3086hadhigherradiation use efficiency as compared to HD-2967 in all weather conditions.
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