Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 497390
Title Swiddens under transition : Consequences of agricultural intensification in the Amazon
Author(s) Jakovac, C.C.; Peña-Claros, M.; Mesquita, R.C.G.; Bongers, F.; Kuyper, T.W.
Source Agriculture, Ecosystems and Environment 218 (2016). - ISSN 0167-8809 - p. 116 - 125.
DOI http://dx.doi.org/10.1016/j.agee.2015.11.013
Department(s) Forest Ecology and Forest Management
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Brazil - Cassava - Labor - Riverine Amazonia - Shifting cultivation - Weeds - Yield
Abstract

Swidden cultivation is one of the most widespread agricultural systems in the tropics. Due to socio-economic changes, swiddens are either abandoned, substituted for other agricultural systems, or intensified. In the region of the middle Amazon river, Brazil, the high market demand for cassava flour (farinha) combined with land scarcity is inducing agricultural intensification. We define agricultural intensification as an increase in the frequency of swidden-fallow cycles and a decrease in the fallow period. In this study, we evaluate the consequences of agricultural intensification for management practices and swidden productivity in one of the main cassava producing areas of the Brazilian Amazon. We used ethnographic and biophysical surveys to characterize the current management practices and to evaluate the effect of repeated swidden-fallow cycles within a short fallow period regime on swidden size, weed infestation and life-form composition, weeding effort and cassava productivity. Our results show that with repeated swidden-fallow cycles cassava yield decreases, weed cover increases and weed composition changes from a tree-dominated to a graminoid-dominated community. Such changes in the weed community result in increased weeding effort, to which farmers respond by cultivating smaller swiddens. Therefore, the ongoing agricultural intensification leads to lower swidden productivity and household income without ensuing clear benefits for farmers. Limited access to fertilizers, herbicides and technical assistance combined with the market demand for a single product hinders adaptation. Broadening market opportunities and improving technical assistance to farmers could raise the diversification of production and sources of income and guarantee higher resilience to the system.

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