Effect of Phosphorus and Potassium on Growth and Yield of Maize (Zea mays L.)

The field experiment titled “Effect of Phosphorus and Potassium on Growth and Yield of Maize (Zea mays L.)” was conducted Response of during the rabi season of 2022. in Crop Research Farm, Department of Agronomy, Naini Agricultural Institute, SHUATS, Prayagraj (U.P.). The experiment was laid out in a Randomized Block Design with ten treatment combinations. The soil in the experimental area was sandy loam with pH (7.6), EC (0.305 d S/m), organic carbon (0.23 %), available N (184.8 kg/ha), available P (16.45 kg/ha) and available K (187.64 kg/ha). Seeds are sown at a spacing of 60 cm × 25 cm with a seed rate of 25 kg/ha. Consisting of three Phosphorus levels (50, 70 and 90 kg P2O5/ha) and different Concentration of Potassium levels (35, 55 and 75 kg K2O/ha). Highest plant height (172.79 cm), maximum plant dry weight (134.14g), more number of cobs/plant (1.8), number of seeds/row (17.13), Number of rows/cob (12.40), test weight (232.82), seed yield (6.16 t/ha) and stover yield (10.73 t/ha.) was recorded in treatments 9 Phosphorus (90 kg/ha.) + Potassium (75 kg/ha.). Maximum gross return (178395.75 INR/ha), net return (132277.78 INR/ha) and B:C ratio (2.9) were also recorded in treatment 9 Phosphorus (90 kg/ha.) + Potassium (75 kg/ha.).