Author(s):

Tapas Ranjan Sahoo, RK Paikaray, B Behera and SN Jena

Abstract: A field experiment was conducted at main research farm of OUAT, Bhubaneswar, Odisha. The experiment was laid out in double split design with 27 treatment combinations and three replications. In main plot sunflower residue was removed in one plot, incorporated in another plot and in third plot no sunflower was grown. In subplot three methods of establishment of rice was taken namely dry direct seeded, wet direct seeded and transplanting method of rice establishment. Three different nutrient management practices was given to rice in sub sub plot i.e. first is fully organic where only FYM was used as nutrient source, in second one integrated approach was followed through 75 percent of nitrogen through inorganic nutrient source with 25 percent of organic source and the third case is pure inorganic where only chemical fertilizer was given at the rate of 60-30-30 kg of N-P₂O₅-K₂O per ha. Weed observations were recorded after 20 and 40 DAS/DAT by help of quadrant method. Significantly lower weed number and weed dry weight was observed in sunflower residue incorporation and with transplanting method during both the years of experimentation.

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