Response of potato (Solanum tuberosum L.) varieties to different levels of nitrogen and potash

Abstract

The experiment was conducted at Potato Research Station, S. D. Agricultural University, Deesa, Gujarat (India) in 2021-22 to show the response of potato cultivars to different levels of nitrogen and potash. Nine treatment combinations comprising of three levels of nitrogen and potassium (225 kg N and K2O/ha, 275 kg N and K2O/ha and 325 kg N and K2O/ha,) and three different cultivars i.e. K. Ganga, K. Lima and K. Khyati were employed in this investigation. Among the three cultivars, K. Ganga variety recorded significantly higher total tuber yield as well as net realization and benefit cost ratio. Among the different levels of nitrogen and potash significantly higher plant height, maximum number of stems/hills, highest yield of A, B and C grade tuber yield (t/ha), highest total and marketable yield, highest haulm yield, higher dry matter & starch content, highest NPK content as well as uptake in tuber and haulm, highest available N and K2O after harvesting and maximum net realization of ₹ 426028/ha with the BCR of 2.62 were recorded application of 325 kg N and K2O/ha.