00770nam a2200229 a 450000100080000000500110000800800410001910001480006024500660020826000350027430000090030949000240031865000110034265000220035365000240037565000210039965000250042065000260044565000270047165000240049865000180052210436122014-02-22       1975    bl uuuu     u01u1 u    #d1 aINTERNATIONAL AND NATIONAL OUTLOOK, SYMPOSIUM, 1974 NOV : CHICAGO - USHERWOOD, N.R. ; DOLL, E.C. ; STELLY, M. ; KRAL, D.M. ; EISELE, L.C. (EDS)  aThe necessity for efficient nutrient utilizationbproceedings  aMadison, Wiscounsin: ASAc1975  a75p.  aSpecial Publication  aABONOS  aABONOS FOSFATADOS  aABONOS NITROGENADOS  aABONOS POTASICOS  aAPLICACION DE ABONOS  aAUMENTO DE PRODUCCION  aFACTORES DE PRODUCCION  aINDUSTRIA DE ABONOS  aPRODUCTIVIDAD