Y. SINGH; D. C. CHAUDHARY (2001) “ Sustainability of rice (Oryza satha)-wheat (Triticum aestivum) sequential cropping through introduction of legume crops and green-manure crop in the system”, Indian Journal of Agronomy, 41(4), p. 41_4 . doi:10.59797/ija.v41i4.3700.