00715    a2200145   4500020001500000082001500015100002300030245030100053260005100354300002100405440004500426650001700471650005600488700002500544  a0792334132  a631.4bMAN  aLadha, J.K. eed.   aManagement of biological nitrogen fixation for the development of more productive and sustainable agricultural systems bextended versions of papers presented at the symposium on biological nitrogen fixation for sustainable agriculture at the 15th congress of soil science, acapulco, mexico, 1994  aBostonbKluwer Academic Publishersc1995g1995  a[iv],287p.c27cm  aDevelopments in plant and soil sciences   aSoil science  aSpecific techniques; apparatus, equipment,materials  aPeoples, M.B. eed.