Lokanath H. MalligawadRaghu H.S.2016-11-142016-11-142011http://krishikosh.egranth.ac.in/handle/1/85404A field experiment to study the performance of linseed (Linum usitatissimum L.) cultivars to different ratios and levels of nitrogen and phosphorus fertilizers was conducted at MARS, Dharwad in medium black clay soil during rabi 2009-10 under irrigated conditions. Two linseed cultivars (Indira Alsi 32 and T-397) were raised with two ratios at five different levels of nitrogen (N) and phosphorus (P2O5) fertilizers at a common potassium fertilizer rate (20 kg K2O ha-1). Cultivar Indira Alsi 32 produced higher seed yield (1155 kg ha-1) compared to cv. T-397 (1066 kg ha-1). Cultivar Indira Alsi 32 recorded higher seed weight plant-1, weight of capsules plant-1 and total dry matter production (TDMP) compared to cultivar T-397. Cultivar Indira Alsi 32 recorded higher oil content and oil yield (37.04 % and 427 kg ha-1) when compared to cultivar T-397 (35.6 % and 379 kg ha-1). Application of nitrogen and phosphorous fertilizers at N/P ratio of 2.67 either with lower or higher levels of N and P fertilizers produced 29.62 % to 35.55 % higher yield over N/P ratio of 0.00 and 0.89 % to 6.89 % higher yield over N/P ratio of 2.00 either with lower or higher levels of N and P fertilizers. TDMP plant-1 and its accumulation in different plant parts decreased as the ratios and levels of N and P fertilizers decreased. The uptake of nutrients (N, P2O5 and K2O kg ha-1) increased with increase in the ratios and levels of nitrogen and phosphorous fertilizers. Higher seed yields were observed at N/P ratio of 2.67 with higher level of N and P fertilizers. Interaction of cultivars Indira Alsi 32 and T-397 with the application of different ratios and levels of nitrogen and phosphorus fertilizers with respect to gross returns, net returns and B:C ratio recorded non-significant differences.AgronomyThesis