TY - GEN AU - Ladha, J.K. AU - Peoples, M.B. TI - Management of biological nitrogen fixation for the development of more productive and sustainable agricultural systems : extended versions of papers presented at the symposium on biological nitrogen fixation for sustainable agriculture at the 15th congress of soil science, acapulco, mexico, 1994 SN - 0792334132 U1 - 631.4 PY - 1995/// CY - Boston PB - Kluwer Academic Publishers KW - Soil science KW - Specific techniques; apparatus, equipment,materials ER -