Fertilizer Phosphorus Prescription With and Without FYM for the Desired Yield Target of 70 qha-1 of Rice

With a view to assess the extent of fertilizer phosphorus requirement for an yield target of 70 qha^-1 of rice(ADT-36) during kharif season, the gradient experiment-rice (ADT-43) followed by test crop experiment-rice (ADT-36) were conducted on Vertisol based on STCR approach. Making use of the data generated from field experiment, basic parameters were estimated, fertilizer adjustment equations were developed. The basic data obtained as NR qha^-1, %CS and %CF for phosphorus were 12.53, 61.07 and 10.67, respectively. The efficiency of FYM with respect to P was 16.48. The results revealed at 20 kg soil available phosphorus ha^-1, the fertilizer P requirement was 100 kgha^-1. With the conjoint use of FYM, the fertilizer P dose was reduced to 87 kgha^-1.