Soil fertility as influenced by different organic sources and inorganic fertilizer after harvest of kawach seed (Mucuna prurience)

A field experiment was conducted at Dr. P. D. K. V., Akola (M.S.) during 2011–12 and 2012–13 to study the effect of different organic sources and inorganic fertilizer on soil fertility after harvest of kawach seed on Inceptisol. The experiment comprised nine treatments replicated thrice in randomized block design involving 2.5 and 5 t FYM/ha, 1 and 2 t sheep manure/ha, 2 and 4 t vermicompost/ha, 25: 50 and 12.5: 25 kg/ha NP through inorganic. The physico-chemical properties of soil viz., pH and EC were not significantly influenced by the application of various organic and inorganic treatments. Whereas the treatment differences were significant with reference to soil fertility changes in respect of organic carbon, available N, P, K and S in the soil. The highest organic carbon, available N, P, K and S were recorded with the treatment T6 (4 t vermicompost/ha) followed by treatment T7 (N and P through inorganic @ 25: 50 kg/ha) and T2 (5 t FYM/ha) during both the years of experiment. The maximum availability of micronutrients viz., Fe, Mn, Zn and Cu was noticed in the treatment T6 (4 t vermicompost/ha) as compared to all the other treatments during both the years of experiment. However, the treatments involving other organic manures application were also effective in increasing the availability of micronutrients than inorganic treatments and control.