|
|
|
|
|
| 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 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Prat, Christian; Ly, Boun-Tieng; Lepigeon, I.; Faugère, G.; Alexandre, J.L.. |
| The agricultural rehabilitation of tepetates, indurated and sterile volcanic tuffs located along the mexican neovolcanic ridge, is technically possible. However, it is necessary to know in detail the agro-socioeconomical factors of the peasant communities which have these kind of lands, to give them technical answers appropiate to local realities. The studies of 4 communities located in the states of Mexico. Tlaxcala, Jalisco and Michoacan, show that the climatic conditions are mostly difficult (long dry season, irregular rains, early frosts). The use of irrigation is limited. Each producer family cultivates a small surface of land which is principally ejidal. Tepetates areas are the last pieces of land still not distributed and of common use (firewood ans... |
| Tipo: Text |
Palavras-chave: COMMUNAUTE VILLAGEOISE; COMMUNAUTE AMERINDIENNE; TERRE AGRICOLE; EXPLOITATION AGRICOLE FAMILIALE; ECONOMIE RURALE; SYSTEME DE PRODUCTION; ENVIRONNEMENT; HISTOIRE; PROPRIETE FONCIERE; TEPETATE; SOL VOLCANIQUE; REHABILITATION DU SOL. |
| Ano: 1997 |
URL: http://www.documentation.ird.fr/hor/fdi:010012929 |
| |
|
|
| De Noni, Georges; Viennot, Marc; Trujillo, G.; Custode, E.. |
| In the highlands of Ecuador, the response to an increase in alimentary needs leads to extend cultivable lands. Under these conditions, the reclamation of the pyroclastic hardened volcanic soils by mechanical woorks is a vital necessity. However the new soil material which has been roturated and disagregated, presents such a susceptibility that it becomes important to protect it against erosion. In order to offer sustainable alternatives, experimental studies have been undertook in two experimental stations located in the interandean valley next to Quito (2,500 - 2,900 m), in a subhumid to subarid climate with two dry seasons (2 to 4 months). The field experiment was carried out during 2 cultural years, in small runoff plots where daily runoff, erosion and... |
| Tipo: Text |
Palavras-chave: EROSION; CONSERVATION DU SOL; RUISSELLEMENT; PARCELLE DE CULTURE; CANGAHUA; REHABILITATION DU SOL; ZONE DE MONTAGNE. |
| Ano: 1997 |
URL: http://www.documentation.ird.fr/hor/fdi:010012922 |
| |
|
| |
|
|
|
