Description

The phosphorus status and fractionation under maize, sorghum, wheat and mustard on Alfisols and Inceptisols, to find out the contribution of crops, microorganisms and phosphatic fertilizers on phosphorus mobilization and to study the phosphorus influx under these crops. The field study was carried out with all the four crops in both the soils and rhizosphere and non-rhizosphere soils were analysed for different P fractions in order to find out the P status as well as to characterize the role of different P- fractions at 45 DAS and at harvest. The study was carried out with all the four crops and five fumigation levels namely B1: No plants; B2: Fumigated soils with plants; B3: Unfumigated soils with plants; B4: Fumigated soils with recommended dose of phosphatic fertilizer as SSP with plants and B5: Unfumigated soil with recommended dose of phosphatic fertilizer as SSP with plants using complete randomized block design (CRD) with four replications. The physico-chemical properties of the soils are pH 7.90, EC 0.35 dSm-1 Av. P 10.45, Av. K 230.60 kg/ha for Alfisols and pH 7.80, EC 0.50 dSm-1 Av. P 17.20, Av. K 285.90 kg/ha for Inceptisols.