Effect of varying levels of nitrogen and plant density on the production behaviour of undersize seed tubers of potato (Solanum tuberosum) in north-western hills of India

Abstract

Production potentiality of undersize (15g) seed tubers of potato (Solanum tuberosum L.) variety Kufri Giriraj was evaluated at three plant densities, viz. 83 333; 111 111 and 166 666 plants /ha and four doses of nitrogen in high hills of north –western India. Both, plant density as well as nitrogen doses had a significant effect on the number as well as yields of total and seed size tubers. A plant density of 166 666 plants/ha with 160 kg nitrogen/ha resulted in maximum number of total and seed size tubers as well as yields. Thus, in the hills, under size (15 g) seed tubers of potato should be planted at a plant density of 166 666 plants/ ha by following 60 cm × 10 cm spacing along with a nitrogen dose of 160 kg/ha for getting the maximum number as well as yields of total and seed size (20-80g) tubers.