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Singh, VK and Dwivedi, B S and Shukla, A K and Chauhan, Y S and Yadav, R L (2005) Diversification of rice with pigeonpea in a rice-wheat cropping system on a Typic Ustochrept: effect on soil fertility, yield and nutrient use efficiency. Field Crops Research, 92 (1). 85-105 . ISSN 0378-4290
Chauhan, Y S and Apphun, A and Singh, VK and Dwivedi, B S (2004) Foliar sprays of concentrated urea at maturity of pigeonpea to induce defoliation and increase its residual benefit to wheat. Field Crops Research, 89 (1). pp. 17-25.