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An experiment was conducted during Kharif and Rabi seasons of 2015-16 and 2016-17in the farmer field of Vijayanagar camp, Tq/Dist: Raichur, to identify the suitable nutrient management approaches for enhancing production potentials of Dry DSR-mustard cropping system. The experiment consisted of ten treatments with application of different category of nutrients as per soil test based nutrient management approaches including control and farmers fertilizers practice. Significantly higher grain (54.73 q ha-1) and straw (68.38q ha-1) yield of rice was recorded in SSNM approach targeted yield of 55 q ha-1 (T 8) and the increase was to anextent of 7.9 and 16.7 per cent, respectively when compared to Farmers' Fertilizer Practice (FFP). The increase in grain and straw yield of rice in T 8 could be due to the maximum number of panicles per m-2 (438.1), Length of panicle (19.8cm), Number of grains per panicle (143.9), Test weight (13.98 g), lower sterility percentage (6.8), higher plant height (72.8cm), higher dry matter production (62.25 g plant-1), higher number of tillers m-2 (678.0) and maximum leaf area (1418 cm 2 plant-1).

SUMMARY :The improvement in grain yield characters was the manifestation of improved growth characters as a result of higher uptake of nutrients caused by balanced supply of nutrients in this regard soil test based nutrient management approaches aims provide a scientific basis for balanced fertilization to obtain more yield per unit of fertilizer investment. An experiment was conducted during Kharif and Rabi seasons of 2015-16 and 2016-17in the farmer field of Vijayanagar camp, Tq/Dist: Raichur, to study the effect soil test based nutrient management approacheson grain yield and nutrient uptake pattern in Dry DSR and their residual response was ascertained to mustard in DSR-mustard cropping sequence. Pooled results indicate that maximum rice yield (54.73 q ha -1 ) was recorded with application of nutrients as per SSNM approach for targeted yield of 55 q ha -1 in Dry DSR.Similarly maximum mustard seed yield (592 kg ha -1 ) was recorded with the residual effect of nutrients through SSNM approach targeted yield of 55 q ha -1 and higher uptake of nutrients (grain + straw) viz., nitrogen (117.72 kg ha ) by Dry DSR. Similarly higher uptake of nutrients (seed + stover) viz., nitrogen (26.07 kg ha -1 ), phosphorus (5.70kg ha -1 ), and potassium (34.99kg ha -1 ) by mustardwas recorded with residual effect of nutrients through SSNM approach targeted yield of 55 q ha -1 as compared to RDF, farmer practice and other soil test methods.How to cite this article : Raghavendra, Rao, K. Narayana, Wani, S.P., Ravi, M.V., Veeresh, H., Channabasavanna, A.S. and Swamy, Mahadeva (2017). Effect of soil test based nutrient management approaches on grain yield and nutrient uptake of dry DSR-mustard cropping system.

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A survey work was conducted during summer season of 2013 in different type of calcareous soils from Raichur, Shahapur and Surpur (Sholapur) taluks and was investigated in order to provide detailed information on their physico-chemical properties and nutrients distribution. The clay content of slightly, moderately and strongly calcareous soils are relatively high (>40%). The average soil reaction from slightly, moderately and strongly calcareous soils 8.04, 8.47 and 8.43, respectively. These soils were slightly saline to saline and organic carbon for these soils remained low to medium. Average cation exchange capacity value was highest in strongly calcareous soils (67.85 c mol kg -1 ) followed by moderately (66.37 c mol kg -1 ) and slightly calcareous soils (56.18 c mol kg -1 ). The CaCO3 content variation in these soils may be due to parent material, native CaCO3 content in soil profile and arid and semiarid climate. The available nutrients like N, P, K, S and micronutrients are low in strongly calcareous soils followed by moderately and slightly calcareous soils. Available nutrients relatively high in case of slightly calcareous soils. Higher values of exchangeable Ca and Mg were recorded in strongly calcareous soils.