R.S. NARANG, S.S. BRAR and SANJEEV KUMAR (2001) “ Effect of crop-residue incorporation load on nitrogen require- ment of succeeding crops and soil productivity in rice (Oryza sativa) -wheat (Triticum aestivum) system”, Indian Journal of Agronomy, 44(1), p. 44_1 . doi:10.59797/ija.v44i1.3453.