Impact of Crop Residue Management on nutrient balance in rice-wheat cropping system in an Aquic hapludoll

Abstract An experiment conducted on rice-wheat cropping system under the Mollisol order of Pantnagarto study the effect of crop residue management practices on nutrient balance during 2005-2006. Threecrop residue management practices; crop residue incorporation, crop residue remove and cropresidue burnt and two levels of nitrogen (100 kg/ha, 150 kg/ha) and three levels of potassium (0 kg/ha, 30 kg/ha, 60 kg/ha) was applied. The results revealed that NPK uptake were highest in cropresidue incorporation as compare to crop residue remove and burnt. Nitrogen balance was negativein all the treatments, and potassium balance also fallows same as nitrogen except potassiumapplication with crop residue incorporation. Rice–wheat yield and nutrient uptake were significantlyhigher in case of crop residue incorporation with nitrogen and potassium application. Key words: Crop Residue Management, Rice-Wheat Cropping System, Nutrient balance Introduction Rice-wheat system is the widely practiced croppingsystem in India and cover about 9.5% m ha, about 90%of this is under Indo-Gangatic plain (Gupta