Nitrate movement in a volcanic ash soil under different irrigation regimes. Movimiento de nitrato en un suelo volcánico bajo diferentes regímenes de riego.

A A Millar,N Duarte,E Riquelme,E Arias, Elisabeth C Molina,F Bertsch,A Cordero,J Canessa,F Sancho,A Alvarado,Cruz Huerta L Etchevers J D, J A Alvarado,L J Cajuste,A Alvarado H,F Bertsch H,E Bornemisza S,G Cabalceta A,W Forsythe H,C Henriquez H,R Mata C,E Molina R,R Salas C, E Bornemisza, Eds,A Nieuwenhuyse,N Van Breemen,H Navarro Garza,Perez O M A Astier M, Enrique Perez,W A Van Dooremolen,M Dechesne,F Van Ruitenbeek, K A,J L V De Macedo,C F T Da Costa,M Darce Rivera, S H Bonilla,C De Asturias,W R Raun,H J Barreto,S Gerrits, M J Plantinga,K Groenesteijn, A Saborio, Beebe S Araya Villalobos R,Donald R Beck,Villatoro M Bertsch F,W Badilla,J Collinet,M Mazariego,C J Gamboa H, P L Chavarria C,A Soto A,J R Baides Portillo,D Kass,Centro Agronomico Tropical De Investigacion Y Ensenanza,M L Jimenez, J H Kauffman,C G Herrera Reyes,G Leclerc,Edzo Veldkamp,A M Weitz,A L Tineo Bermudez,Manolo Mazariegos,J A Soley M,A Serfaty Benshimol, R B Peck,J A Palencia Ortiz,L Granados Mayorga,M M Hernandez, F A Maldonado P,J I Guerrero Prato,S P Gonzalez Martinez,R Fuentes Flores,M E Ortiz Escobar,R D Zapata Hernandez,S Sadeghian Khalajabadi,H F Franco Alavarez,K Hergoualch,M C Henao Toro,Bruno Delvaux,J M Rodriguez,R Araya, P Bouharmont

mag（2001）

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deforestation,productivity,reclamation,nitrification,phosphorus,trace elements,soil structure,green manures,denitrification,soil analysis,elements,fertilisation,geochemistry,conservation tillage,landscape,risk,soil fertility,organic matter,sol,nitrogen,upland rice,irrigation,nitrogen fixation,precipitation,solar radiation,hydrodynamics,mineral resources,soil conservation,soil degradation,measurement,soil chemistry,adsorption,geology,land use,toxicity,soufre,gramineae,chemical composition,soil types,sulphur,crop rotation,soil ph,absorption,climate,plant breeding,reforestation,weathering,simulation,soil water,indicator plants,rhizosphere,crop yield,erosion,agriculture,sustainability,ion exchange capacity,soil classification,acrisol,ion exchange,nitric oxide,production factors,soil amendments

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