S. Biswas, Md. R. Chowdhury, A Mohanta, K Sar, S Acharya and J.M.L. Gulati
Abstract
A field experiment was carried out at Agriculture Research Station, Brinjhagiri, Siksha O Anusandhan Deemed to be University; Odisha during Summer 2022 entitled âResponse of Green Gram (Vigna radiata L.) to major nutrients following omission approach under diverse dates of sowingâ to find out most suitable time for sowing in summer season with relation to major nutrients. For this a split plot design was opted with the main plot consisting of 3 dates of sowing viz. 22nd January, 12th February & 5th March. And the sub plot consisted of 8 treatments with all the three major nutrients following omission approach viz. N1P1K1, N1P1K0, N1P0K1, N1 P0K0, N0P1K1, N0P1K0, N0P0 K1 & N0P0K0. A recommended fertilizer dose of 20-40-20 kg of nitrogen, phosphorous and potassium per ha was applied. The following experiment showed that growth parameters and yield attributing characters varied significantly. Under nutrient treatments those that received all three major nutrients showed maximum values such as the plant height(45.10 cm), leaf number (25.83), dry matter accumulation(373.97 g/m2), CGR(3.12) and protein content (24.46). The maximum crop yield attributes were recorded for those sown on 12th February (7th SMW). The maximum seed yield of 936.9 kg/ ha and stover yield of 2366.22 kg/ha was recorded from N1P1K1 treatments. The nutrient content and uptake was also found to be maximum for those under N1P1K1 treatment and the D2 (12th February, 7th SMW) sowing date. Regarding the economics of the various treatment combination, the treatment that received all three major treatments N1P1K1 fetched the highest net return of 30784 and maximum B:C ratio of 1.82 while those sown on D2 showed the highest return of 28631 and B:C ratio of 1.80.