Spatiotemporal dynamics of soybean crop in the Matopiba region,Brazil (1990–2015) |
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Institution: | 1. Graduate Program in Applied Geoscience, University of Brasília, Brazil;2. Embrapa Cerrados, Brazil;3. Embrapa Secretaria de Inteligência e Relações Estratégicas, Brazil;4. Universidade Ceuma, Brazil;1. Department of Hydrology, Czech Technical University in Prague, Thákurova 7, CZ-166 29 Prague, Czech Republic;2. Institute of Hydrobiology, Biology Centre CAS, Na Sádkách 7, CZ-37005 České Budějovice, Czech Republic;1. Rubenstein School of Environment & Natural Resources, University of Vermont, 81 Carrigan Drive, Burlington, VT 05405, USA;2. Gund Institute for Environment, University of Vermont, 617 Main Street, Burlington, VT 05405, USA;1. Escola Superior de Agricultura “Luiz de Queiroz” – ESALQ/USP, University of São Paulo, Piracicaba, São Paulo, Brazil;2. Department of Economics, Londrina State University – UEL, Londrina, Paraná, Brazil;2. Applied GeoSolutions, 87 Packers Falls Road, Durham - NH, 03824, USA |
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Abstract: | Brazil is a world leader in the production and export of grains, particularly soybeans. The newest agricultural frontier in Brazil is the Matopiba region, which is a continuous zone formed by the states of Maranhão, Tocantins, Piauí, and Bahia, located mostly within the Cerrado biome. The objective of this study was to analyze the spatiotemporal dynamics of soybean production and yield in the Matopiba region. We analyzed municipality-based planted areas and production data obtained by the Brazilian Institute of Geography and Statistics during 1990–2015. Yield was estimated from the production and planted area, and the data were analyzed using global and local Moran indices. The results showed that soybean production in the Matopiba region does not occur randomly. Positive and significant autocorrelation was found at the beginning of the time series among those municipalities located in the west of Bahia. This region influenced the soybean expansion from south to north. Currently, high-production areas are concentrated in two autocorrelated blocks: one in western Bahia and the other in the central Matopiba region. Analysis of spatial autocorrelation involving yield showed a decreasing trend at the end of the time series. The presence of municipalities with high yield surrounded by others with low yield, and vice-versa, were observed. The findings of this study could assist local and regional agricultural planning in the Matopiba region, and support related analyses in other fields of agriculture, the environment, and logistics. |
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Keywords: | Agricultural expansion Soybean Moran index Geostatistics |
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