Field experiment was conducted in black soils in order to study the soil enzyme activities viz., Dehydrogenase, Urease and Phosphatases for maize using Arbuscular mycorrhizal (AM) fungi and Zinc Solubilizing Bacteria (ZSB) in combination with graded levels of ZnSO 4. Treatment consisted of two factors viz.

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Field experiments were conducted during 1996-99 at College of Agricultural Engineering, Kumulur to study the effect of distillery effluent and organic amendments on rice productivity. The distillery effluent with different dilutions was taken in the main plots (10,25,50,75,100 times and water). These treatments were superimposed with different organic amendments viz., FYM at 12.5t/ha, pressmud at 12.5t/ha, gypsum at St/ha, neem leaves at 5.25 t/ha and no manure as control. Results revealed that in the areas where water is available in adequate amount, applications of neem leaves at 6.25 t/ ha was found to be suitable and in the areas where effluent is available, it should be diluted 50 times with water along with application of neem leaves at 6.25 t/ha to increase the rice yield without any detrimental effect on soil health. The treated distillery effluent irrigations resulted in significant increase in soil pH, E.C and organic carbon.

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