Effect of Sulphur Fertilization on the Yield and Quality of Potatoes (Solanum tuberosum L.)

In a field experiment on a sulphur deficient arid brown soil with potatoes (Solanum tuberosum L.) var. Kufri Chandermukhi as a test crop, application of sulphur at three levels viz, 0, 25, and 50 kg S/ha as gypsum increased the yield of potato tubers, content of protein S, total soluble S, total soluble S, total N and total S. With the increase in the content of protein N, there was a simultaneous decrease in total soluble N content. S fertilization significantly increased K and Zn contents, but consistently decreased P content. However, Fe and Mn contents were unaffected. Total N-total S, protein N- protein S, S-N and S-P ratios as influenced by added sulphur are reported. The dose of 25 kg S/ha seems to be optimum for both yield as well as for improving quality of potatoes.