Effect of treating single superphosphate with cowdung
1987
Roy, B. | Jha, J.N. (Agricultural Research Inst., Mithapur, Patna, Bihar (India))
The effect of cowdung-treated single superphosphate (SSP) on panicles/m2 and grain yield of rice variety Sita (135 d duration) was studied in a 3-year wet season field trial. Soil was dark gray, neutral heavy clay (pH 7.1) with poor drainage, medium fertility (0.75% organic C, 0.07% total N, 22 kg available K/ha), and CEC 32.1 meq 1.00 g. P fertilizer was mixed with fresh cowdung in a 1:3 ratio 10-12 h before application. Six levels of P in addition to the P content of cowdung were used in a randomized block design with five replications. Yields from treated plots were significantly higher than from control plots, indicative of nutrient deficiency in the soil. P as SSP mixed with cowdung as a basal dose yielded significantly higher. P incr1072eased yields even when applied as late as at maximum tillering. Both SSP alone and with cowdung applied basally and at maximum tillering increased panicles/m2, except for SSP alone at tiller
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