Author(s): S. TRIPATHY AND D. K. BASTIA

Abstract: The field experiment was undertaken during kharif seasons of 2010 and 2011 to evaluate water and organic nutrient management options for higher productivity of kharif rice and residual soil fertility in a sandy loam soil of organic block of central research farm, OUAT, Bhubaneswar with pH 6.2; OC 6.5g kg ¹ soil; available N, P and K, 190, 30.2 and 165.3 kg ha ¹, respectively. The experiment was laid out in a split plot design with three replications. The main plot was allotted with four water management treatments and the sub plot had four organic nutrient management treatments. Irrigation at 5 days after disappearance of ponded water (ADP), I₃ to rice crop expressed its superiority as regards to plant character, yield 3 attributes, yield and economics. Similarly, dhanicha @ 25 kg seed ha ¹ + FYM @ 2t ha ¹ at 21 DAP + vermicompost @ 2t ha ¹ (basal) (N₄) was found better for all yield attributing characters among organic nutrient management options(ONM) but 4 was at par with dhanicha + FYM @5t ha ¹ at 21 DAP (N₃) and dhanicha +FYM @ 5t ha ¹ (basal) (N ). After application of 3 2 ONM, soil nitrogen and phosphorous showed a negative balance where as soil potassium had positive balance. Available nutrients increased from the initial values irrespective of water and organic nutrient management options in this experiment.

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