Effect of nitrogen and phosphorus on growth and yield of rabi castor (Ricinus communis L.)

摘要

A field experiment was conducted during rabi seasons (2001-02 and 2002-03) to study the effect of four levels of nitrogen (0,40,80 and 120 kg/ha) and three levels of phospohorus (0,30 and 60 kg/ha) on growth and yield of castor (Ricinus communis L). Plant height, LAI, dry matter production, nodes per plant, branches per plant and seed yield increased significantly with each increase in nitrogen level upto 80 kg/ha. Plant height, LAI dry matter production, nodes per plant, branches per plant and seedyield were higher with 60 kg P_2O_5/ha followed by 30 kg P_2O_5/ha and control.