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ThesisItem Open Access PHOSPHORUS DYNAMICS IN VERTISOLS UNDER SUNFLOWER - MAIZE - BENGALGRAM CROPPING SEQUENCE(University of Agricultural Sciences, Dharwad, 1999) BHAT, SHREEPAD; DODDAMANI, V SAn investigation was carried out to know the effect of single superphosphate (SSP), Mussoori rock phosphate (MRP), 25 percent acidulated rock phosphate (PARP) and their combination and P solubilizers viz. FYM, pyrite and P solubilizing microorganisms (PSM) on P transformation, available P, crop yield under sunflower-maize-bengalgram cropping sequence in Verlisols of Water Management Research Centre, Belavatagi, during 1996-97 and 1997-98. Asi incubation study with 28 treatment combinations was also conducted to assess the extent of release of P with time. Results of incubation study revealed that recovery of P from SSP and SSP + PARP at 30,60 and 90 days was 11.1,11.3 and 11.2 and 9.2,8.3 and 9.1 percent, respectively Recovery of P from MRP at the corresponding period was 1.6,1.4 and 4.4 percent. Incorporation of FYM increased available P followed by pynte and PSM at 30 days of Incubation. Available P at harvest of 3 crops with SSP was higher. At harvest of second and third crop, MRP recorded 9.0 and 30 0 percent higher available P over P control. Available P due to solubilizers was in the order of FYM>Pyrite>PSM>control. Yield of sunflower did not differ due to P sources and solubilizers. The highest (27.07q/ha) and lowest (24.42 q/ha) yield of maize was registered with SSP and MRP, respectively. The yield of bengalgram was also the highest (16.74 o/ha) due to residual effect of SSP and was on pay with p sources except MRP and P control. Among the solubilizers higher grain yield of crops was observed with FYM followed by pynte and PSM. The Ca-P was higher in MRP and FARP; and with their combination with other P sources and was because of di and tri-calcium, phosphate present in MRP and less solubility of Ca-P in alkaline sods. SSP and its combination with other P sources increased Al-P and Fe-R which are well correlated with yield of crops. On the basis of crop yield available P it is inferred that the next best alternative treatment for increased crop yield and available P was SSP + PARP.ThesisItem Open Access CHARACTERIZATION AND AMELIORATION OF ACID SOILS(University of Agricultural Sciences GKVK, Bangalore, 1992) Prabhuraj, D K; Parashiva Murthy, A SABSTRACT NOT AVAILABLEThesisItem Open Access Quality and efficiency of water hyacinth and press mud based enriched composts(University of Agricultural Science, Dharwad, 1998) Prashanthi, Adhikari; Suseela Devi, LABSTRACT NOT AVAILABLEThesisItem Open Access DYNAMICS OF POTASSIUM AND CROP RESPONSE STUDIES IN SELECTED SOIL SERIES OF ALFISOLS OF KARNATAKA(University of Agricultural Science, Dharwad, 1995) Tippeswamy, H M; Kenchanna Gowda, S KABSTRACT NOT AVAILABLEThesisItem Open Access NUTRITION AND FERTIGATION STUDIES IN OIL PALM [Elaeis guineensis Jacq) UNDER SOUTHERN TRANSITION ZONE OF KARNATAKA(University of Agricultural Science, Dharwad, 1997) Rame Gowda, M; Srinivasa Murthy, C AABSTRACT NOT AVAILABLEThesisItem Open Access Biomass turnover, nutrient status and biological processes in different land use systems(University of Agricultural Science, Dharwad, 1997) Nagaraja, M S; Ramakrishna Parama, V SABSTRACT NOT AVAILABLEThesisItem Open Access MINERALOGY AND GENESIS OF TYPICAL LATERITIC SOILS IN PENINSULAR INDIA(University of Agricultural Science, Dharwad, 1995) Natarajan, A; Sarma, V A KABSTRACT NOT AVAILABLEThesisItem Open Access BEHAVIOUR OF ATRAZINE IN SOME SELECTED SOILS OF KARNATAKA(University of Agricultural Science, Dharwad, 1997) Hanagodi, S V; Suseela Devi, LABSTRACT NOT AVAILABLEThesisItem Open Access BEHAVIOUR OF METALAXYL AND MANCOZEB RESIDUES IN SOILS AND TOMATO(University of Agricultural Science, Dharwad, 1996) Hanumantha Raju, T H; Awasthi, M DABSTRACT NOT AVAILABLE
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