Modeling the soil-water-crop-atmosphere system to improve crop and water productivity in Stage II of Indira Gandhi Canal Command Area

Sita Ram Jat, Vinay Nangia, I. L. Gulati. (31/12/2016). Modeling the soil-water-crop-atmosphere system to improve crop and water productivity in Stage II of Indira Gandhi Canal Command Area. Rajasthan, India: Swami Keshwanand Rajasthan Agricultural University (SKRAU).

Abstract

The study entitled “Modelling the Soil-Water-Crop-Atmosphere System to Improve Land and Water Productivity in Stage II of IGNP” was carried out at village Amarpura (Bajju), Bikaner, Rajasthan, during 'kharif' and 'rabi' seasons of 2012-13 and 2013-14. To assess current physical and economic land and water productivity, N–uptake, and water use of different crops, the CropSyst crop simulation model was calibrated using 2012-13 growing season data. After calibration of the model for 'kharif' and 'rabi' season crops, the calibrated model was validated using 2013-14 growing season data for the site-specific conditions using the calibrated crop model parameter values. CropSyst model was validated for green area index (GAI), aboveground biomass (AGB), seed yield, soil moisture and N-uptake for each crop. Groundnut and clusterbean in 'kharif' and wheat, mustard, chickpea, cumin and isabgol in 'rabi' were prominent crops; groundnut-wheat, groundnut-cumin, groundnut-isabgol, groundnut-mustard and clusterbean-chickpea were major cropping systems of the study region.