00457naa a2200133 a 450000100080000000500110000800800410001910000150006024501510007526000090022665000230023565000210025877300440027916080531995-06-27       1984    bl ---       0--  u    #d1 aABADIA, A.  aEfecto de tres sustancias humicas en el nivel de algunos nutrientes en suelo.(Effect of three humic substances in the level of nutrients in soil).  c1984  aMatéria Orgânica  aQuímica do Solo  tAn. Aula Deigv.17, n.1, p.67-87, 1984.