Economic analysis of onion as influenced by combined application of bio-fertilizers with major nutrients during kharif season under irrigated and rainfed conditions

Investigations on the cost : benefit ratio as influenced by bio-fertilizers alongwith varied levels of NPK in onion (cv. Bellary Red) were conducted in medium black soils during kharif seasons under irrigated and rainfed conditions at the Agricultural Research Station, Hiriyur located under Central Dry Zone of Karnataka. Effects of 12 treatments were tested on onion crop in medium black soil under field condition. The results revealed that among the different treatments, the maximum net income of Rs. 56328 and 52135 with maximum cost: benefit ratio of 4.00 (1 : 4.00) and 3.94 (1 : 3.94) was obtained from the plants provided with Azospirillum+100% N+PK (T(7)) during kharif seasons under irrigated and rainfed conditions, respectively. By analyzing the results of the cost : benefit ratios obtained under irrigated and rainfed conditions during kharif seasons, maximum cost : benefit ratio of (4.00) (1 : 4.00) was obtained under irrigated condition from the plants provided with Azospirillum+100% N+PK (T(7)) viz., Azospirillum+12 5 : 50 : 12 5 NPK kg/ha. This level could be recommended for Bellary Red onion, particularly in Central Dry Zone of Karnataka for getting maximum cost : benefit ratio in kharif season both under irrigated and rainfed conditions.