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Registros recuperados: 37
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2007 : estudio socioeconomico de las comunidades campesinas de la Reunion y del Pedregal (Mun. Huiramba) IRD
Gruffat, D.; Prat, Christian.
Tipo: Text Palavras-chave: ECONOMIE RURALE; SYSTEME DE CULTURE; AGRICULTEUR; TYPOLOGIE; COMMUNAUTE AMERINDIENNE; STRATEGIE PAYSANNE; AGRICULTURE DURABLE.
Ano: 2007 URL: http://www.documentation.ird.fr/hor/fdi:010049858
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Agua y talpetate : toba palagonitizada de Masaya = Water and talpetate : palagonitised tuff of Masaya IRD
Prat, Christian; Blandon Soto, E.; Martinez Ortega, J.M.; Herrera, M..
Tipo: Text Palavras-chave: SOL; ROCHE VOLCANIQUE; HORIZON; INDURATION; CARACTERISTIQUE HYDRIQUE; PLUVIOMETRIE; DEGRADATION DU SOL; EROSION; TALPETATE.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:010031265
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Analisis de las caracteristicas de las precipitaciones de 1992 a 1995 en San Miguel Tlaixpan (Texcoco, Mexico) IRD
Prat, Christian.
In the UE-ORSTOM-CP-UAT-UG research program about rehabilitation of Mexican tepetates, one of the problems is to control soil erosion and productivity of these new soils. The caracterization of rainfall in relation to its occurence, quantity, energy, etc. is fundamental. This paper shows the results of the analysis of 4 years of precipitations measured with a pluviograph on the study area, and the processing of these data with soft-wares pertaining to ORSTOM (PLUVIOM and ARES). In spite of the short time of the registrations, we could show that the climate is C(w1)(w)-subhumid temperature with an ustic hydric regime in the classification of Koeppen modified by G. Benavides, as other authors have previously showed, but the total precipitation level for the...
Tipo: Text Palavras-chave: PRECIPITATION; AGRICULTURE; AGROCLIMATOLOGIE; EROSION; CLIMAT; METHODOLOGIE; VARIATION TEMPORELLE; GEOSTATISTIQUE; TEPETATE; ABATTEMENT DE LA PLUIE.
Ano: 1997 URL: http://www.documentation.ird.fr/hor/fdi:010012923
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Analisis del comportamiento de cultivos en tepetate t3 incorporado a la agricultura de temporal, Texcoco (Mexico) IRD
Baez, A.; Ascencio, E.; Prat, Christian; Marquez, A..
The purpose of this study is to precise the conditions of agricultural reclamation of tepetate in the eastern part of the Mexico valley (Texcoco). The Tepetate is a compact and sterile material. The lack of nitrogen, carbon and the poor biological activity limit the possibility of plant development. But after the use of heavy machinery and terracing, it is possible, under certain conditions, to use this new soil for agriculture. From 1993 until 1996, we compared native soil and different treatments applied to the tepetate reclaimed, such as the deepness of the reclamation, the use of chemical/biological fertilisers, the mono-culture/associated cultures, the tillage practices of the new soil on 6 different terraces of 700 m2. One of our goals was to find...
Tipo: Text Palavras-chave: AGRICULTURE; SYSTEME DE CULTURE; MISE EN VALEUR DU SOL; FERTILISATION DU SOL; ENGRAIS MINERAL; ENGRAIS ORGANIQUE; RECOLTE; PLUVIOMETRIE; PRODUCTIVITE AGRICOLE; TEPETATE; REHABILITATION DU SOL; SOL VOLCANIQUE.
Ano: 1997 URL: http://www.documentation.ird.fr/hor/fdi:010012921
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Analisis fractal de los tepetates IRD
Oleschko, K.; Miranda, M.E.; Prat, Christian.
The degree of fragmentation and irregularity of tepetate areas can be measured with fractal parameters. A lot of different empirical fractal dimensions can be used with this purposed. Some of these dimensions were estimated and compared in the present work. The tepetates lineal and mass fractal dimensions were independent of the scale of measurement. These data indicate the near ideal fractal dimensionality of tepetate areas. The doble value of lineal fractal dimension was similar to the mass fractal dimension. The tepetate surface fractal dimensions indicate the considerable irregularities of tepetate areas boundaries related with advanced erosion in the studied area. (Résumé d'auteur)
Tipo: Text Palavras-chave: SOL; EROSION; METHODE D'ANALYSE; CARTE; FRACTAL; SOL VOLCANIQUE INDURE; TEPETATE.
Ano: 1997 URL: http://www.documentation.ird.fr/hor/fdi:010012915
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Aspects socio-économiques de la réhabilitation de tufs volcaniques indurés (tepetates) au Mexique IRD
Alexandre, J.L.; Faugere, G.; Lepigeon, I.; Tien Ly, B.; Prat, Christian.
Tipo: Text Palavras-chave: MISE EN VALEUR DU SOL; INDURATION; FACTEUR SOCIOECONOMIQUE; SYSTEME DE PRODUCTION; EXPLOITATION AGRICOLE FAMILIALE; ELEVAGE; COMMUNAUTE VILLAGEOISE; CONDITIONS DE VIE; MILIEU RURAL.
Ano: 1998 URL: http://www.documentation.ird.fr/hor/fdi:010025602-056
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Bilan de 3 ans de fonctionnement d'un système anti-érosif : aspects techniques et socio-économiques, B.V. Sud du lac de Managua, Nicaragua IRD
Prat, Christian; Martinez Ortega, J.M.; Blanco Beteta, F.O..
Tipo: Text Palavras-chave: LUTTE ANTIEROSIVE; AMENAGEMENT HYDROAGRICOLE; PERCEPTION PAYSANNE; IMPACT SOCIOECONOMIQUE.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:35027
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Conditions de mise en culture d'un tuf volcanique induré (tepetate) au Mexique IRD
Baez, A.; Ascencio, E.; Prat, Christian; Marquez, A..
Tipo: Text Palavras-chave: MISE EN VALEUR DU SOL; INDURATION; SYSTEME DE CULTURE; CULTURE ASSOCIEE; CULTURE PLUVIALE; PLUVIOMETRIE; RENDEMENT; FERTILISATION DU SOL; PLANTE CULTIVEE; RECOMMANDATION.
Ano: 1998 URL: http://www.documentation.ird.fr/hor/fdi:010025602-055
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El talpetate de la region centro-pacifico de Nicaragua : una toba palagonitizada del volcan Masaya IRD
Prat, Christian; Quantin, Paul.
Tipo: Text Palavras-chave: SOL; ROCHE VOLCANIQUE; HORIZON; INDURATION; PROFIL PEDOLOGIQUE; TOPOSEQUENCE; CARACTERE MORPHOLOGIQUE; CARACTERISTIQUE CHIMIQUE; CARACTERISTIQUE PHYSIQUE; COMPOSITION MINERALOGIQUE; MICROMORPHOLOGIE; TALPETATE.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:010013374
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Elementos metodologicos y estudios socioecomicos en suelos volcanicos endurecidos IRD
Navarro, H.; Munoz, S.; Olivares, F.; Prat, Christian.
Tipo: Text Palavras-chave: SOL; ROCHE VOLCANIQUE; INDURATION; EROSION; IMPACT SOCIOECONOMIQUE; SOCIETE RURALE; COMMUNAUTE VILLAGEOISE; ECONOMIE RURALE; SYSTEME DE PRODUCTION; SYSTEME D'EXPLOITATION AGRICOLE; UTILISATION DU SOL; ECONOMIE FAMILIALE; METHODOLOGIE; TEPETATE.
Ano: 1998 URL: http://www.documentation.ird.fr/hor/fdi:010014981
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Erodibilité d'un tuf volcanique induré (tepetate) mis en culture au Mexique IRD
Prat, Christian; Baez, A..
Tipo: Text Palavras-chave: SOL DEGRADE; INDURATION; MISE EN VALEUR DU SOL; ERODIBILITE DU SOL; SYSTEME DE CULTURE; PRATIQUE CULTURALE; PLUIE; RUISSELLEMENT; EROSION HYDRIQUE; LUTTE ANTIEROSIVE; RECOMMANDATION.
Ano: 1998 URL: http://www.documentation.ird.fr/hor/fdi:010025602-059
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Erosion de una toba volcanica endurecida en proceso de rehabilitacion IRD
Prat, Christian; Baez, A.; Ascencio, E.; Marquez, A..
Tipo: Text Palavras-chave: SOL; ROCHE VOLCANIQUE; INDURATION; EROSION HYDRIQUE; TRANSPORT SOLIDE; EVOLUTION DES SOLS SOUS CULTURE; CONSERVATION DU SOL; FERTILISATION DU SOL; TEPETATE.
Ano: 1998 URL: http://www.documentation.ird.fr/hor/fdi:010014980
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Erosion et restauration de sols volcaniques indurés "tepetates" de la région de Mexico et de Tlaxcala, Mexique IRD
Quantin, Paul; Prat, Christian; Zebrowski, Claude.
Au Mexique, sur le haut plateau central, dans les Etats de Mexico et de Tlaxcala, l'érosion a fait affleurer des horizons indurés de sols volcaniques, appelés "tepetates". Une étude de la restauration de sols agricoles sur ces matériaux stériles et de leur conservation a été réalisée. L'étude concerne notamment les propriétés des tepetates qui limitent l'infiltration de l'eau et leur fertilité ainsi que celles qui sont favorables à la restauration d'un sol agricole fertile et stable. Cet exposé présente les résultats majeurs à propos de l'érosivité des pluies, du ruissellement et de l'érosion, de l'évolution des états de surface, des rendements des cultures et de la rentabilité de cette restauration en milieu paysan. La valeur cumulée d'érosivité annuelle...
Tipo: Text Palavras-chave: SOL; ROCHE VOLCANIQUE; INDURATION; EROSION HYDRIQUE; RUISSELLEMENT; PRODUCTIVITE AGRICOLE; RESTAURATION; TEPETATE.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:010009090
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Erosion et restauration de sols volcaniques indurés "tepetates" de la région de Mexico et de Tlaxcala, Mexique IRD
Quantin, Paul; Prat, Christian; Zebrowski, Claude.
Tipo: Text Palavras-chave: SOL; ROCHE VOLCANIQUE; INDURATION; EROSION HYDRIQUE; AMENAGEMENT DU SOL; PRODUCTIVITE; TEPETATE.
Ano: 1994 URL: http://www.documentation.ird.fr/hor/fdi:40577
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Erosion y escurrimiento en parcelas de tepetate t3 en Texcoco, México IRD
Prat, Christian; Baez, A.; Marquez, A..
The reclamation of volcanic indurated soils called tepetates in Mexico must control soil erosion and generate a good productivity of these new soils according to a sustainable development strategy. This paper shows the results of an european research program involving ORSTOM and the Colegio de Postgraduados en Agrociencias in the eastern part of valley of Mexico (Texcoco). Different systems of culture have been studied (mono/associated culture, with/without manure, soil/tepetate, natural/cultivated tepetate, tepetate with deep/normal subsoiling, tillage practice) during four years on 8 large terraces (700 m2). After every rain, we measured the runoff, took and dried all the sediments, sampled water and followed the vegetation cover, the soil surface...
Tipo: Text Palavras-chave: EROSION; RUISSELLEMENT; SOUS SOLAGE; MAIS; PARCELLE DE CULTURE; FEVE; ORGE; TEPETATE; CULTURE EN TERRASSE.
Ano: 1997 URL: http://www.documentation.ird.fr/hor/fdi:010012924
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Estrategias de sobrevivencia : el caso de las comunidades de la microcuenca de Atecuaro, municipio de Morelia, Michoacan IRD
Vidal Lagos, D.; Prat, Christian; Gonzalez Parra, C.; Zapata, E..
Tipo: Text Palavras-chave: SOCIETE RURALE; SURVIE; COMMUNAUTE AMERINDIENNE; MIGRATION; GESTION DE L'ENVIRONNEMENT; PROGRAMME DE RECHERCHE; ENQUETE; STRATEGIE PAYSANNE; PLURIACTIVITE.
Ano: 2007 URL: http://www.documentation.ird.fr/hor/fdi:010049866
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Estudio espacial de los tepetates del eje neovolcanico mexicano : metodologia para un programa de investigacion IRD
Servenay, Alice; Prat, Christian; Sorani, V.; Gonzalez, E..
Because of the imprecision of the known surface and the real distribution of the tepetates along the neovolcanic belt, as well as the agro-socio-economical problems that cause the presence of this volcanic indurated level in the fields, we proposed to test a methodology which uses both teledetection and GIS on 1/25,000 scale to identify the area with tepetates. This work, based on previous knowledge of natural and anthropogenic reasons for the apparition of tepetates, aims to precise if information gathered in the Mexico and Tlaxcala valleys is also valid for the rest of the neovolcanic belt. We created a map of potential tepetate presence with a GIS and confronted it with teledetection views and field information. Then we crossed agro-socio-economic data...
Tipo: Text Palavras-chave: TELEDETECTION SPATIALE; SOL; ROCHE VOLCANIQUE; INDURATION; REPARTITION GEOGRAPHIQUE; IMAGE SATELLITE; METHODOLOGIE; SYSTEME D'INFORMATION GEOGRAPHIQUE; TEPETATE.
Ano: 1997 URL: http://www.documentation.ird.fr/hor/fdi:010012920
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Estudio espacial de los tepetates (suelos volcanicos endurecidos) del eje neovolcanico mexicano : metodologia para un programa de investigacion IRD
Servenay, Alice; Prat, Christian; Sorani, V.; Gonzalez, E..
Because of the imprecision of the known surface and the real distribution of the tepetates along the neovolcanic belt, as well as the agro-socio-economical problems that cause the presence of this volcanic indurated level in the fields, we proposed to test a methodology which use both teledetection and GIS on 1/25000 scale to identify the area with tepetates. This work, based on previous knowledge of the conditions of apparition of the tepetates, natural as well as anthropogenic reasons, could precise if this information determined in the Mexico and Tlaxcala valleys are also good for the rest of the neovolcanic belt. After the creation of a map of "potential tepetate presence" with a GIS, we confront this map with teledetection vues and fields...
Tipo: Text Palavras-chave: SOL; ROCHE VOLCANIQUE; INDURATION; REPARTITION GEOGRAPHIQUE; TELEDETECTION SPATIALE; SYSTEME D'INFORMATION GEOGRAPHIQUE; METHODOLOGIE; PROGRAMME DE RECHERCHE; TEPETATE.
Ano: 1996 URL: http://www.documentation.ird.fr/hor/fdi:010013390
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Etude du "talpetate", horizon volcanique induré de la région centre-Pacifique du Nicaragua : genèse, caractérisation morphologique, physico-chimique et hydro-dynamique, son rôle dans l'érosion des sols IRD
Prat, Christian.
Tipo: Text Palavras-chave: PEDOGENESE; CARTE PEDOLOGIQUE; ROCHE VOLCANIQUE; PROFIL PEDOLOGIQUE; HORIZON; INDURATION; CARACTERE MORPHOLOGIQUE; CARACTERISTIQUE PHYSIQUE; CARACTERISTIQUE CHIMIQUE; MINERALOGIE; GEOCHIMIE; CARACTERISTIQUE HYDRIQUE; EROSION; TECPETATE.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:34879
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Evolution des états de surface des "tepetates" cultivés, horizons indurés de sols volcaniques du Mexique : impact sur le ruissellement et l'érosion IRD
Janeau, Jean-Louis; Jérome, G.; Leroux, Yann; Prat, Christian; Quantin, Paul; Zebrowski, Claude.
L'érodibilité des tepetates (horizons indurés de sols volcaniques mis à nu par érosion du sol) réhabilités en sols agricoles, a été étudiée dans la vallée de Mexico au cours de deux programmes successifs (1989-92 et à partir de 1994) de l'Union Européenne au Mexique. Outre la mesure des pluies, du ruissellement et des pertes en terre, une observation a été faite de l'évolution des états de surface sur des parcelles de tepetate et de sol billonnées et plantées en maïs, ou laissées à nu. Ces observations, sur des peties parcelles "Wischmeier" (44 m2) en 1991 ou des terrasses de 500 m2 en 1994, ont été faites selon la méthode de Casenave et Valentin (1989). Elles montrent une évolution maintenant bien connue des états de surface du tepetate et du sol cultivés...
Tipo: Text Palavras-chave: SOL; ROCHE VOLCANIQUE; HORIZON; INDURATION; ERODIBILITE DU SOL; CROUTE; STRUCTURE DU SOL; EVOLUTION DES SOLS SOUS CULTURE; POROSITE; INFILTRATION; RUISSELLEMENT; TEPETATE.
Ano: 1996 URL: http://www.documentation.ird.fr/hor/fdi:010009059
Registros recuperados: 37
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