Physico-chemical Properties of Soil as Influenced by Combined Application of Organic and Inorganic Sources to Fodder Oat and Succeeding Residual Fodder Maize

An experimental trial was carried out during 2018-19 and 2019-20 at Banaras Hindu University, Varanasi, to assess the direct and residual effect of varying levels of fertility and organic sources on different soil chemical properties. Application of fertility levels had non-significant direct and residual effects on soil health in both the years, though maximum values were obtained with 100% RDF. After fodder oat harvest, the maximum values of available NPK in the soil were observed using FYM over poultry manure and vermicompost. Application of 50 kg nitrogen ha-1 through organic sources recorded distinctly higher soil available N, P, and K after the harvest of fodder oat. However, the residual effect of nitrogen levels and organic sources failed to touch the significant level of soil health parameters after harvesting fodder maize.