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Auteur J.A. Garcia |
Documents disponibles écrits par cet auteur (3)

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Article
Complex agricultural problems concern many countries, as a result of competing economic and environmental objectives. In this work we model three common agricultural problems through optimization techniques: a water-scarce area with overexploite[...]![]()
Communication à un Congrès (avec Actes)
M.D. Matias ; J.A. Garcia ; A. Puerto ; J.A. Saldaña | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989A study is made of secondary succession following abandonment of cultivation on hillside terraces. The ordering analyses of the shrub species reveal a superposition of bioclimatic effects and those due to the impact of human activity, with a pre[...]![]()
Communication à un Congrès (avec Actes)
A. Puerto ; J.A. Garcia ; M.D. Matias ; A. Saldaña ; C. Pérez | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The aim of the present work is to offer new data for discussion on the structural characters induced by the tree covering in grassland communities. Particular emphasis is given to the heterogeneity caused by the location (canopy understory, cano[...]