Managing Phosphorus Availability from Organic and Inorganic Sources for Optimum Wheat Production in Calcareous Soils

In calcareous soils, wheat productivity is much lower due to improper nutrient management, especially phosphorus (P). Therefore, this study was conducted manage P availability from various organic (Control, FYM and Sugar cane straw applied at the rate of 10 ton ha?1) inorganic 100% rock phosphate (RP), 50% acidulated RP, single super (SSP) diammonium (DAP)) sources 90 kg P2O5 ha?1 in soil while using as test crop. When averaged across sources, SSP performed better emergence m?2 (126), tillers (431), spikes (419), grains spikes?1 (61), plant height (95.1 cm), 1000-GW (40 g), biological yield (11,023 ha?1), grain (4022 use efficiency (10.5%), leaves tillering (2.63 mg kg?1) anthesis stage (2.50 kg?1), heading (1.73 post-harvest (1.56 compared rest mineral sources. Similarly, among than others for all tested traits. Integration with manures further improved crop performance content. tons integration or RP recommended ensuring optimum under soils.