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Paper Details

Effect of potassium application on its transformation and use efficiency under soybean wheat cropping system

B.P. MEENA*, S.D. BILLORE1, A.K. VYAS2, H.K. SUMERIYA3 AND K.K. MEENA

Journal Title:International Journal of Agricultural Sciences
Abstract


A field experiment was conducted at Instructional Farm, Directorate of Soybean Research (DSR), Indore M.P. during 2006-07 and 2007-08 to study effect of potassium application on its transformation and use efficiency under soybean wheat cropping system. Data revealed that normal sowing date of soybean and wheat recorded significantly higher seed and straw yield (2544 and 2481 and 4908 and 7284 kg ha-1, respectively).Total K uptake by soybean-wheat system and potassium harvest index also higher over late sowing date of both the crops. With respect to K levels, application of 49.80 kg K2O the recorded maximum yield of soybean and wheat, K uptake by soybean, wheat and system and potassium harvest index. The highest agronomic and physiological K use efficiency was associated with 33.2 kg K/ha. Maximum partial factor productivity, recovery efficiency and physiological K use efficiency was recorded with JS 335. Among soybean genotypes, JS 9305 showed its superiority in case of agronomic K use efficiency, internal K use efficiency and recorded higher yield, system, total K uptake and potassium harvest index over control.

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