MANJUNATHAIAH, Dr.H.M.GUNDLUR, S. S.2019-10-242019-10-241998-08-19Th-4940http://krishikosh.egranth.ac.in/handle/1/5810132777Studies made on forms and distribution of copper in red and lateritic soils of North Karnataka indicates that the total and available copper content of red soils was in the range from 37.0 to 83.0 and 0.29 to 3.38 ppm,where as in lateritic soils the range was from 35.0 to 54.0 and 0.29 to 4.30 ppm respectively. The pH and organic matter contents of soil are found to influence the total and available Cu content of soil. The magnitude of different fractions of Cu in both the soil types are found to be followed the order, residual copper > organically bound copper > occluded copper >inorganically bound copper > water soluble and exchangeable copper. Field experiments were conducted on red soils at Manoli, Hanumanamatti and Kulageri during summer 1995 and 1996 under irrigated condition, to study the response of groundnut {TMV-2) to copper sulphate and copper ore tailings (GOT). Application of COT and CuSO4 (at different levels respectively) significantly increased the concentration and uptake of all the nutrients except Ca++ and Mg++. Pooled data of two years of all three locations indicated that application of CuSo4 @ 30 kg/ha significantly increased the groundnut pod yield (21.14 q/ha),haulm yield (27.71 q/ha) and oil yield (6.50 q/ha). Similarly application of COT @ lOOQ kg/ha produced highest groundnut pod yield (2-1.Oa q/ha), haulm yield (29.95 q/ha) and oil yield (7.5G q/ha). Between CuSO4 and COT treatments the pod yield, haulm yield and oil yield were superior with application of COT over CuSO4 application. This is due to combined effect of 2n, Fe, Cu and sulphur present in the COT, Further, the COT left over considerable amount of residual Zn, Cu, Fe and S which will enhance the soil fertility level and useful for succeeding crop.ennullThesis