00399naa a2200157 a 450000100080000000500110000800800410001910000180006024500310007826000090010965000180011865300140013670000200015070000160017077300550018620119252015-03-20       1971    bl ---       0--  u    #d1 aLOOMIS. R. S.  aAgricultural productivity.  c1971  aProdutividade  aAgrícola1 aWILLIAMS, W. A.1 aHALL, A. E.  tAnn. Rev. Plant. Physiol.gv. 22, p. 431-68, 1971.