The present investigation entitled, "Management of nutrients for Bt and non Bt cotton (Gossypium spp.) under irrigated condition" was conducted at the Post Graduate Institute Farm, Mahatma Phule Krishi Vidyapeeth., Rahuri, Maharashtra, India during the years 2007 and 2008 with the following objectives.i. To study the effect of apportioning and levels of nutrients on growth, yield contributing characters and leaf reddening in cotton. ii. To study the influence of apportioning and levels of nutrients on seed cotton yield and quality of Bt and non Bt hybrids. iii. To estimate the nutrient uptake.