Abstract

Field experiments were conducted with sorghum (Co26) soybean (Co.1) cropping sequence in Typic Ustropeat oil with different tillage operations and manure treatments The post harvest soil samples of soybean Swere analysed for DFPA-Zn, Cu, Fe and Mn content. The results showed that incorporation of organic manures (coirpith, poultry manure, goat manure and FYM) increased the available Zang Fe content, while the availability of Cu was not influenced by the incorporation af organic manures. Ploughing with country plough and burning the stubbles in situ significantly increased the Zn content, while for Fe it was footatry ploughing and composting the stubbles in site) and for Mn, C, and C, recorded the highest value A regards DTPA-Cu, disc ploughing under dry condition recorded the highest value. A the four macronutrient cations were higher in the surface soil than in subsoil.

Keywords: Sorghum, Sabean Tillage Organic manures. Micronutrients