Response of Onion (Allium Cepa L.) To the Application of Nitrogen, Phosphorus and Potassium on the Sandy-Loam Soils of Hissar

Factorial experiments with three levels of nitrogen (56, 112 and 168 kg/ha two levels of phosphorus (28 and 56 kg/ha P₂O₅) and two levels of potassium (0 and 28 kg/ha K₂O) were conducted for three successive years from 1968–1970 at the Vegetable Research Station of the Haryana Agricultural University, Hissar, on sandy-loam soils. Maximum bulb size and yield were recorded with a combination of 112 kg/ha nitrogen, 56 kg/ha P₂O₅ and 28 kg/ha of K₂O. This treatment was also found to be most economical on the basis of net returns per hectare.