Manoj RaghavSati, Kailash2017-05-122017-05-122016-07http://krishikosh.egranth.ac.in/handle/1/5810011009The present investigation entitled “Effect of zinc sulphate application on growth, yield and quality of potato (Solanum tuberosum L.)” was carried out to examine the mode of zinc sulphate application on growth, yield and quality of potato. The field experiment was conducted during winter seasons of 2014-15 and 2015-16 at Vegetable Research Centre, G.B. Pant University of Agriculture & Technology, Pantnagar, Udham Singh Nagar, Uttarakhand. The experiment was carried out in randomized block design with three replications. The experiment comprised ten treatments. Two year investigation revealed that the performance of potato crop was significantly influenced by zinc sulphate application. Among all treatments, treatment T7 (zinc sulphate @ 25 kg/ha at the time of planting + RDF) was found best with respect to tuber yield (35.55 and 37.35 t/ha) and also registered maximum benefit: cost ratio (2.18 and 2.28) during both the years, respectively, whereas, treatment T9 (zinc sulphate @ 12.5 kg/ha. at the time of planting and 12.5 kg/ha. at the time of earthing up + RDF) was found best with respect to quality of potato tubers viz., dry matter (22.57 and 22.27 %), starch (18.56 and 19.11 %) and protein (8.20 and 8.45 %) during both the years, respectively. Based on overall performance, it could be concluded that under prevalent climatic conditions of tarai region of Uttarakhand, application of zinc sulphate @ 25 kg/ha at the time of planting along with 160:100:120 kg N:P2O5:K2O/ha can be recommended to get maximum tuber yield and higher net returns from the potato crop, whereas, the application of zinc sulphate @ 12.5 kg/ha at the time of planting and 12.5 kg/ha at the time of earthing-up along with 160:100:120 kg N:P2O5:K2O /ha can be recommended to get maximum quality of potato tubers.ennullThesis