01436nam a2200445 a 450000100080000000500110000800800410001902000190006010000180007924500690009726000430016630000100020950002440021965000240046365000230048765000250051065000310053565000300056665000210059665000120061765000080062965000230063765000240066065000150068465000170069965000240071665000160074065000230075665000210077965000360080065000130083665000140084965000240086365000220088765000230090965000100093265000150094270000170095770000160097410160752014-02-22       1991    bl uuuu     u00u1 u    #d  a 0-89118-796-01 aFOLLETT, R.F.  aManaging nitrogen for groundwater quality and farm profitability  aMadison, Winscounsin (USA): SSSAc1991  a357p.  a"Proceedings of a symposium sponsored by Division A-5 of the American Society of Agronomy ; S-1, S-3, S-6 and S-8 of the Soil Science Society of America ; and Divisions C-3 and C-5 of the Crop Science Society of America, Anaheim, CA, 1988"  aABONOS NITROGENADOS  aAGUAS SUBTERRANEAS  aAPLICACION DE ABONOS  aAPLICACIONES DEL ORDENADOR  aBALANCE HIDRICO DEL SUELO  aCALIDAD DEL AGUA  aDRENAJE  aEUA  aEVAPOTRANSPIRACION  aFACTORES CLIMATICOS  aHIDROLOGIA  aINFILTRACION  aLEGISLACION AGRARIA  aLIXIVIACION  aMANEJO DEL CULTIVO  aMANEJO DEL SUELO  aMOVIMIENTO DEL AGUA EN EL SUELO  aNITRATOS  aNITROGENO  aORDENACION DE AGUAS  aRECURSOS HIDRICOS  aRECURSOS NATURALES  aRIEGO  aTENDENCIAS1 aKEENEY, D.R.1 aCRUSE, R.M.