Effect of Nitrogen, Potassium and Sulphur Fertilization on Nutrient Uptake and Bulb Yield of Onion (Allium cepa L.) in Arid Western Rajasthan

Present field experiment was conducted at the Instructional Farm, College of Agriculture, S.K. Rajasthan Agricultural University, Bikaner, during Rabi season in two consecutive years (201617 and 2017-18) to find out the effect of nitrogen, potassium and sulphur fertilization on nutrient uptake and yield of onion in arid western Rajasthan. The treatments laid out in a split plot design replicated thrice. The results of the study have clearly showed that methods and application levels of nitrogen, potassium and sulphur significantly increased N, P, K and S uptake and bulb yield. Similarly, result revolted that the nitrogen fertilization of @ 80 kg N ha -1 (soil application) + 20 kg N ha -1 (4 foliar sprays), recorded highest bulb yield (227.62 q ha -1 ), which were closely followed by N2 (210.45 q ha -1 ) which was significantly higher over control.