PAUL T, RANA DS, CHOUDHARY AK, DAS TK, RAJPOOT SK. Crop establishment methods and Zn nutrition in Bt-cotton: Direct effects on system productivity, economic-efficiency and water-productivity in Bt-cotton-wheat cropping system and their residual effects on yield and Zn biofortification in wheat. Indian J Agri Sci. 2016;86(11):1406–12. doi:10.56093/ijas.v86i11.62892