GOWDA, R CERESH2016-11-032016-11-0310-08-13TH-10618http://krishikosh.egranth.ac.in/handle/1/83540Ongoing long term fertilizer experiments under finger millet-maize and rice-cow pea cropping systems at GKVK Bengaluru and VC Farm Mandya were selected to study the different fractions of phosphorus, sulphur and boron in soil. Besides the fractions, their available nutrient status was also studied. The results of the finger millet-maize cropping system indicated that application of chemical fertilizer in combination with FYM revealed that all the available nutrients were maintained. With respect to P fractions like Al-P, Fe-P, Occl-P and total-P were found to be higher in 150 % NPK applied treatment; however Ca-P was higher percent in treatment receiving 100 % NPK+FYM+Lime. Higher percent of available sulphur and its fractions were recorded in treatments receiving single super phosphate and lower availability and its fractions were noticed in T9-100%NPK-S and T7-100%N. Higher boron availability and its fractions were recorded in treatments receiving FYM along with chemical fertilizers. In rice-cow pea cropping system here also available nutrient status maintained in inorganic and FYM applied treatments .Higher phosphorus availability was recorded in treatment receiving STCR based fertilizer recommendation. Higher per cent of Al-P, Fe-P, Occl-P and total-P fractions were recorded in 100%NPK+Zn+S treatment. With respect to sulphur availability and its fractions 100%NPK+Zn+S recorded higher values. Available boron and its fractions were higher in FYM applied treatments compared to other treatments. Hence the application of recommended doses fertilizer in combination with FYM helps to better maintenance of soil health as well as available nutrient status of soil.enbiological phenomena, developmental stages, genes, organic compounds, communication technology, proteins, biological development, necrosis, research methods, concentratesThesis