00482naa a2200145 a 450000100080000000500110000800800410001910000150006024501310007526000090020665000250021570000160024070000150025677300650027116038281995-06-27       1981    bl ---       0--  u    #d1 aJAUERT, R.  aInvestigations into the level and effectiveness of nitrogen fertilization at different cereal proportion in the crop rotation.  c1981  aRotação de Cultura1 aANSORGE, H.1 aMULLER, S.  tArch. Acker Pflanzen. Bodenkd.gv.25, n.10, p.629-636, 1981.