• Dr. S. KRISHNAPRABU M.Sc. (Ag.) Ph.D.

A field experiment was conducted at experimental farm, annamalai university, annamalai nagar during 2012 and 2013 to study the effect of integrated nutrient management on rice productivity, profitability and soil fertility in eastern Himalayan region on a sandy loam soil. The experiment was laid out in ramdomized block design with 16 treatments with 3 replications. Among the organic sources, poultry manure (2.5 t ha-1) was found to be most profitable in terms of productivity, profitability and sustaining soil fertility. The crop receiving 2.5 t poultry manure ha-1 along with 75 kg N +16.5 kg P + 31.3 kg K ha-1 improved yield attributes and yield (6.03 t ha-1) as well as nutrient uptake and crop profitability (₹.366.28 /ha/day) over other treatments. The same treatment recorded significant improvement in soil organic carbon, nitrogen, phosphorus and potassium status of soil after harvest of the crop. The highest benefit: cost ratio (2.76) and returns (₹.47616 ha-1) were recorded with 5 t Sesbenia green manure ha-1 + 75 kg N +16.5 kg P + 31.3 kg K ha-1 and 2.5 t poultry manure ha-1 + 125% CDF, respectively over other treatments. The lowest net returns (₹. 11508 ha-1) and B: C ratios (1.66) were recorded under 5t Sesbenia green manure ha-1.

Economics, organic manures, inorganic fertilizers, nutrient uptake, rice, yield

"EFFECT OF INTEGRATED NUTRIENT MANAGEMENT ON RICE PRODUCTIVITY, PROFITABILITY AND SOIL FERTILITY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.568-575, June 2019, Available :http://www.jetir.org/papers/JETIR1908384.pdf

"EFFECT OF INTEGRATED NUTRIENT MANAGEMENT ON RICE PRODUCTIVITY, PROFITABILITY AND SOIL FERTILITY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp568-575, June 2019, Available at : http://www.jetir.org/papers/JETIR1908384.pdf