Vol. 3 No. 1
Effect of graded doses of chemical fertilizers and granulated and prilled urea in rice-rice crop sequence.
Author(s): S. MAITI, S. PAL, RAKHI DEBARMA, H. BANERJEE AND T. PATRA
Abstract: Field experiments were conducted during both boro seasons (2004-05 and 2005-06) and kharif season (2005 and 2006) at the Regional Research Station, New Alluvial Zone, Bidhan Chandra Krishi Viswavidyalaya, West Bengal to study the effect of sources of urea and different doses of chemical fertilizers under rice-rice cropping sequence. Yield components and grain yield increased with the increasing doses of chemical fertilizers in both the seasons and years. In rice-rice cropping system, the application of 125 % recommended dose of chemical fertilizer along with granulated form of urea during both boro and kharif seasons produced highest grain yield (9.37 t ha-1 yr-1), net return (Rs. 20,063 ha-1 year-1) and return per rupee investment (Rs. 1.50). Total nitrogen decreased in all the treatment combinations but available phosphorus and potassium content of soil after four consecutive rice cropping increased slightly where the crop received 100 or 125 % recommended dose of nutrient in addition to granulated form of urea as compared to initial value.
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