Effect of organic matter amendment on soil available phosphorus content; Where; T1-control (recommended NPK); T2- ½ of recommended NPK; T3-FYM @ 1.5 % by soil weight; T4-full dose of press mud; T5-full dose of compost; T6-full dose of poultry manure; T7-full dose of sesbania green manure; T8-T2 + ½ FYM; T9-T2 + ½ press mud; T10-T2 + ½ compost; T11-T2 + ½ poultry manure; T12- T2 + ½ sesbania green manure.