Int.J.Curr.Microbiol.App.Sci (2018) 7(2): 1239-1247 1239 Original Research Article https://doi.org/10.20546/ijcmas.2018.702.152 Effect of Nutrient Management Approaches and Major Nutrients on Dry Direct Seeded Rice (dry- DSR) in TBP Command Area V. Rajesh * , S.R. Balanagoudar, H. Veeresh, Ashok Kumar Gaddi and Y.M. Ramesh Department of Soil Science and Agricultural Chemistry, College of Agriculture, Raichur, Karnataka, India *Corresponding author ABSTRACT Introduction Rice is a vital food to more than half of the world‟s population. Rice accounts for 55 per cent of total cereal production in the country. The per capita food intake in India is 2,234 calories per day of which 30 per cent comes from rice. In India, rice is grown in an area of 43.95 m ha with an annual production of about 106.54 mt and the productivity is about 2.37 t ha -1 (Anon., 2015). In Karnataka, rice is cultivated in command areas of Cauvery, Tungabhadra and Upper Krishna, where conventional puddling and transplanting are the major system of cultivation. The total area under rice in Karnataka is 1.42 m ha with an annual production of 3.5 mt and the productivity to the tune of 2.63 t ha -1 (Anon., 2015). The nutrient requirement of direct-seeded rice is probably lower than that of transplanted rice during early growth stages. In TBP areas are known for using imbalance dose of nutrients with higher tendency for N application. This also causes environmental damage and increase the total cost of production as heavy N use makes the rice crop more susceptible to pest and disease and thus increases cost of protection. Unbalanced fertilizer use also causes soil degradation and particularly when N fertilizer use drives the removal of P and K International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 7 Number 02 (2018) Journal homepage: http://www.ijcmas.com The present experiment was conducted during kharif-2016 at ARS, Dhadesugur with ten treatments and three replications. Results revealed that the significant higher grain and straw yield were recorded with nutrients applied through SSNM approach (7,358 and 10,674 kg ha -1 , respectively) as compare to other treatments. Further, omission of major nutrients has resulted in yield loss of 56 per cent (-N), 16.5 per cent (-P) and 20 per cent (-K) compared to SSNM treatment. Application of fertilizers as per SSNM approach noticed higher nitrogen and phosphorus use efficiency (94.05 and 49.98 %, respectively) and potassium use efficiency of (220.91 %) was noticed in STL rating method. Keywords Target yield, SSNM, STCR, STL, Dry-DSR Accepted: 10 January 2018 Available Online: 10 February 2018 Article Info