Use of APSIM Model for accessing impact of Climate Change on Soybean (Glycine max L.) Germplasm in Vindhyan Region of Madhya Pradesh

Soybean (Glycine max L. ) is an important global legume crop that grows in the tropical, subtropical and temperate climates. Like peas, beans, lentils and peanuts, it belongs to the large botanical family, Leguminosae, in the subfamily Papilionideae. The soybean crops are more sensitive to higher cumulative heat units during cropping season and the yields are affected significantly due to temporal variations in amount of rainfall and also fluctuation in occurrence of monsoon. The available simulation studies with the use of APSIM model of the researchers on the crop shows possible effects of future climate change on soybean yields in the selected region for doubled atmospheric CO2 level and with weather variables using the available seasonal projections for the future. The current studies show that response of elevated CO2 concentrations in the atmosphere suggest higher yields for soybean crop. However, a 38C rise in surface air temperature almost cancels out the positive effects of elevated CO2 on the yield. Soybean crops at some sites are more susceptible to increases in maximum temperature than in minimum temperature and the rainfall with uneven distribution during the monsoon season could be a critical factor for positive result. In this study authors have made an attempt to summarise the possible impact of climate change studies on soyabean crop using simulation models like APSIM.