TY - BOOK AU - Sen, S.P., ed. AU - Abrol, Y. P., ed. AU - Sinha, S.K., ed. TI - Nitrogen assimilation and crop productivity : proceedings of national symposium held at Haryana Agricultural University, Hissar, October 5 - 7,1976 under the auspices of plant biochemical society PY - 1978/// CY - New Delhi PB - Associated Publishing ER -