Abstract

Field experiments were conducted consecutively for three seasons at the Tamil Nadu Agricultural University, Coimbatore, Four rice based cropping systems were evaluated. Application of either half or full dose of K fertilizer was tested for the respective crops. Skipping of K application to any two of the component crops of the cropping systems and K application to all the three crops were included. Rice rice rice system registered the highest net return. However, rice- rice. soybean system recorded higher net retum as well as BC ratio. Application of half the recommended dose of K was remunerative.

Keywords: Rice Based Cropping Systems, Potassium Fertilizer, Gross Return, Net Return, BC ratio.