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Smallholders' agricultural practices trajectories in Amazonia

Billard C., Gond V., Oszwald J., Arnauld de Sartre X., Pokorny B.. 2014. Bois et Forêts des Tropiques (319) : p. 53-64.

The large body of research on land use and land cover changes in the Brazilian Amazon generally shows the significant effect of smallholder production systems. However, it is still unclear how far the specific social and economic characteristics of smallholders influence on land use and land cover changes. To shed more lighton this aspect, the effects of selected socio-economic variables on land uses at the household level were investigated in a case study on the ¿Palmares-2¿ settlement in the Brazilian Amazon. Using LANDSAT TM and SPOT images available for 1986, 1992, 2001 and 2007, land use changes were analyzed on the scale of individual farms. The GIS (Geographic Information System) data were then combined with information from a survey of 44 farmers. Analysis showed that levels of income positively influenced deforestation rates over the period, and that the expansion of pastures and farmlands was significantly greater among households with a higher level of education. The availability of non- refundable credits correlated with an increase in forest fallows. Areas of bare and/or burned lands were larger among family holdings with lower capital stock that were less permanently established in the area. The findings of this study suggest that income levels and education are highly relevant factors in accounting for land-use and land cover changes among Amazonian smallholders. (Résumé d'auteur)

Mots-clés : landsat; imagerie par satellite; image spot; Éducation; revenu de l'exploitation; petite exploitation agricole; exploitation agricole familiale; cartographie; système d'information géographique; télédétection; enquête sur exploitations agricoles; déboisement; utilisation des terres; couverture du sol; forêt tropicale; amazonie; brésil; déforestation

Thématique : Foresterie - Considérations générales; Structure agraire; Levée et cartographie des sols; Culture des plantes; Méthodes de relevé; Economie familiale et artisanale

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