00639naa a2200193 a 450000100080000000500110000800800410001910000160006024501620007626000090023865000120024765000270025965300210028665300250030765300240033270000190035670000170037577300530039216039571995-06-27       1982    bl ---       0--  u    #d1 aHOPMANS, P.  aEstimation of nitrogen fixation by Trifolium subterraneum L. and Medicago truncatula Gaertn. grown in pots using a non-destructive acetylene reduction assay.  c1982  aMétodo  aTrifolium Subterraneum  aAVALIACAO DE FBN  aLEGUMINOSA TEMPERADA  aMEDICAGO TRUNCULATA1 aDOUGLAS, L. A.1 aCHALK, P. M.  tSoil Biol. Biochem.gv.14, n.5, p.495-500, 1982.