Nitrogen and potassium requirements of processing variety of potato Kufri chipsona 3 under North Gujarat condition

Abstract

The field experiment was conducted during the rabi season of 2012-13 at Potato Research Station, Sardarkrushinagar Dantiwada Agricultural University, Deesa, with nine treatment combinations consisting of three levels of nitrogen, viz., 225 kg N/ha, 275 kg N/ha, and 325 kg N/ha, and three levels of potassium, viz., 225 kg K₂O/ha, 275 kg K₂O/ha, and 325 kg K₂O/ha, tested under a factorial randomized block design with four replications. The yield of 'A' and 'B' grade tubers increased up to 275 kg N/ha. Nitrogen levels brought significant variation in chips colour index and reducing sugar content. In the case of potassium, potassium levels of 325 kg K₂O/ha and 275 kg K₂O/ha behaved equally and produced significantly higher weights of 'A' and 'B' grade tubers with minimum weight of 'C' grade tubers. Maximum reducing sugar content and chips colour index score were observed with the application of 325 kg K₂O/ha; however, the increase was up to 275 kg K₂O/ha. Thus, for getting higher production of processing-grade tuber yield and net realization, potato cv. Kufri Chipsona 3 should be fertilized with 275 kg N/ha and 275 kg K₂O/ha.