H.M.ManjunathaiahSunil D.Tamgale2016-07-222016-07-222005http://krishikosh.egranth.ac.in/handle/1/69172An incubation study was carried out with 26 treatments involving COT treated with different organics and acids to know the change in pH, EC and release of micronutrients, S and Pb from COT and COT treated mixtures over a period of time. Field experiments on farmers field during kharif-rabi of 2002-03 at Garag village and 2003-04 at Yettinagudda village were conducted with 20 treatments to study the effect of COT treated with different organics on groundnut-wheat cropping sequence. Among the organics, the COT treated with VC (0.50 : 2.5) recorded the lowest pH (6.50) at 30th day of incubation. While, COT acidulated with acids recorded the lower pH at zero day of incubation. The higher micronutrients and sulphur release was recorded when COT treated with the ratio of VC 2.5, FYM 10, PM 2 and BGS 5, respectively over COT alone. The release of lead was higher during initial period and gradually decreased with increase in time of incubation when COT was treated with acids. The application of pre-treated COT resulted in significant increase in the growth and yield of groundnut crop and post harvest soil micronutrients and S status. The highest pod yield was recorded with COT 1.0 t + VC 2.5 t ha-1 (3578 kg/ha). The uptake of micro, secondary and major nutrients, protein content, acid value, saponification value and iodine number followed the similar trend. Residual effect on wheat was also significant with respect to yield, protein content, uptake of nutrients and post harvest soil micronutrients and sulphur status. The application of COT 1.0 t + VC 2.5 t ha-1 recorded the highest grain yield (4503 kg/ha). The lead concentration in groundnut kernels was below permissible limit (0.5 ppm) and in wheat grains, it was below detectable limit (<0.001 ppm).Thesis