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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
14/04/1997 |
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Data da última atualização: |
26/08/2011 |
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Autoria: |
JONES, P. G.; RINCON, M.; CLAVIJO, L. A. |
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Título: |
Area classification and mapping for the cerrados region of Brasil. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
[Cali: CIAT], 1992. |
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Páginas: |
94 p. |
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Idioma: |
Inglês |
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Notas: |
Land Use Program-CIAT. Colaboração de Jamil Macedo e Beatrice Pinheiro. |
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Conteúdo: |
The Cerrados region is a large area in central Brasil covered with a varying pattern of grassland vegetation types interspersed with forests, both seasonal and dry. While the area is often referred to as a natural region there is considerable variation in soils, climate and land use. Historically, the main land use has been extensive cattle grazing but is changing rapidly in many areas, not infrequently detremental to the agricultual environment. CIAT and EMBRAPA are interested studies of these processes to assist the move towards sustainable production increases in these areas. The present study is an attempt to subdivide the region and to start to describe the physical and ecological constraints. While it is possible for agricultural scientist to impose an a priori classification on an area (the normal approach to land use capability), this subsumes a number of prejudices inherent in the specialists drawing up the classification. The present is an effort to step back from the techniques of farming or range management and to try to produce an objective classification based on available secondary data. Of course, it is recognised that the mere selection of the variates is a subjective matter. Because of this they have been kept as simple as possible. Data on soils, landfom, climate and land use were combined by sampling from GIS images, in a factor analysis. These factors were then reapplied to the original GIS images and the images of the principal factors were obtained. Meanwhile the sampled points were... MenosThe Cerrados region is a large area in central Brasil covered with a varying pattern of grassland vegetation types interspersed with forests, both seasonal and dry. While the area is often referred to as a natural region there is considerable variation in soils, climate and land use. Historically, the main land use has been extensive cattle grazing but is changing rapidly in many areas, not infrequently detremental to the agricultual environment. CIAT and EMBRAPA are interested studies of these processes to assist the move towards sustainable production increases in these areas. The present study is an attempt to subdivide the region and to start to describe the physical and ecological constraints. While it is possible for agricultural scientist to impose an a priori classification on an area (the normal approach to land use capability), this subsumes a number of prejudices inherent in the specialists drawing up the classification. The present is an effort to step back from the techniques of farming or range management and to try to produce an objective classification based on available secondary data. Of course, it is recognised that the mere selection of the variates is a subjective matter. Because of this they have been kept as simple as possible. Data on soils, landfom, climate and land use were combined by sampling from GIS images, in a factor analysis. These factors were then reapplied to the original GIS images and the images of the principal factors were obtained. Me... Mostrar Tudo |
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Thesagro: |
Cerrado; Mapa; Recurso Natural; Uso da Terra. |
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Thesaurus Nal: |
Brazil; cartography; natural resources. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02180nam a2200241 a 4500
001 1552694
005 2011-08-26
008 1992 bl uuuu u00u1 u #d
100 1 $aJONES, P. G.
245 $aArea classification and mapping for the cerrados region of Brasil.
260 $a[Cali: CIAT]$c1992
300 $a94 p.
500 $aLand Use Program-CIAT. Colaboração de Jamil Macedo e Beatrice Pinheiro.
520 $aThe Cerrados region is a large area in central Brasil covered with a varying pattern of grassland vegetation types interspersed with forests, both seasonal and dry. While the area is often referred to as a natural region there is considerable variation in soils, climate and land use. Historically, the main land use has been extensive cattle grazing but is changing rapidly in many areas, not infrequently detremental to the agricultual environment. CIAT and EMBRAPA are interested studies of these processes to assist the move towards sustainable production increases in these areas. The present study is an attempt to subdivide the region and to start to describe the physical and ecological constraints. While it is possible for agricultural scientist to impose an a priori classification on an area (the normal approach to land use capability), this subsumes a number of prejudices inherent in the specialists drawing up the classification. The present is an effort to step back from the techniques of farming or range management and to try to produce an objective classification based on available secondary data. Of course, it is recognised that the mere selection of the variates is a subjective matter. Because of this they have been kept as simple as possible. Data on soils, landfom, climate and land use were combined by sampling from GIS images, in a factor analysis. These factors were then reapplied to the original GIS images and the images of the principal factors were obtained. Meanwhile the sampled points were...
650 $aBrazil
650 $acartography
650 $anatural resources
650 $aCerrado
650 $aMapa
650 $aRecurso Natural
650 $aUso da Terra
700 1 $aRINCON, M.
700 1 $aCLAVIJO, L. A.
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Registro original: |
Embrapa Cerrados (CPAC) |
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