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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
26/11/1996 |
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Data da última atualização: |
26/11/1996 |
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Autoria: |
VIEIRA, M. J.; GAUDENCIO, C. A.; KOCHHANN, R. A. |
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Título: |
Tillage practices and soil physical degradation in the wheat cropping systems of the warmer areas of Latin America. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
In: SAUNDERS, D.A., ed. Wheat, for the nontraditional, warm areas. Mexico: CIMMYT, 1991. p.242-256. |
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Idioma: |
Inglês |
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Conteúdo: |
Oxisols and Ultisol are the predominant soils in the nontraditional warm areas where wheat is grown in Latin America. They are clayey soils where kaolinite, iron, and aluminum oxides are the most important minerals in the clay fraction. Cation exchange capacity is generally low and organic matter content is less than 3.5%. When soil moisture is high, these soils have a plastic and sticky consistency. The most important crop production system is a winter crop of wheat followed by soybeans in the summer. Small areas are sown to maize and cotton as an alternative to soybeans. At least four soil tillage systems are common in the areas under discussion: traditional, conventional, chisel, and no-tillage--in addition, there can be various combinations of these. Dueto the fragile tropical ecosystem, these soils can be physically degradated when inappropriate soil tillage and management systems are used. The most common problems observed are the pulverization of the topsoil structure, a hard pan below the plow layer, and soil erosion. Tillage systems involving burning of crop residues and disk machinery are particularly responsible for such problems. Soil tillage systems have various degrees of efficiency and the choice of a specific system, associated with reduced machinery use and the improvement of crop rotation systems, appears to stop or even reverse the process of physical soil degradation. |
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Palavras-Chave: |
America Latina; Brasil; Degradacao fisica do solo; Erosion; Parana; Rotacao; Semeadura convencional; Soil physical degradation; Soybean; Tillage practice. |
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Thesagro: |
Erosão; Soja; Trigo. |
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Thesaurus NAL: |
Brazil; crop rotation; Latin America; wheat. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02390naa a2200349 a 4500
001 1458865
005 1996-11-26
008 1991 bl --- 0-- u #d
100 1 $aVIEIRA, M. J.
245 $aTillage practices and soil physical degradation in the wheat cropping systems of the warmer areas of Latin America.
260 $c1991
520 $aOxisols and Ultisol are the predominant soils in the nontraditional warm areas where wheat is grown in Latin America. They are clayey soils where kaolinite, iron, and aluminum oxides are the most important minerals in the clay fraction. Cation exchange capacity is generally low and organic matter content is less than 3.5%. When soil moisture is high, these soils have a plastic and sticky consistency. The most important crop production system is a winter crop of wheat followed by soybeans in the summer. Small areas are sown to maize and cotton as an alternative to soybeans. At least four soil tillage systems are common in the areas under discussion: traditional, conventional, chisel, and no-tillage--in addition, there can be various combinations of these. Dueto the fragile tropical ecosystem, these soils can be physically degradated when inappropriate soil tillage and management systems are used. The most common problems observed are the pulverization of the topsoil structure, a hard pan below the plow layer, and soil erosion. Tillage systems involving burning of crop residues and disk machinery are particularly responsible for such problems. Soil tillage systems have various degrees of efficiency and the choice of a specific system, associated with reduced machinery use and the improvement of crop rotation systems, appears to stop or even reverse the process of physical soil degradation.
650 $aBrazil
650 $acrop rotation
650 $aLatin America
650 $awheat
650 $aErosão
650 $aSoja
650 $aTrigo
653 $aAmerica Latina
653 $aBrasil
653 $aDegradacao fisica do solo
653 $aErosion
653 $aParana
653 $aRotacao
653 $aSemeadura convencional
653 $aSoil physical degradation
653 $aSoybean
653 $aTillage practice
700 1 $aGAUDENCIO, C. A.
700 1 $aKOCHHANN, R. A.
773 $tIn: SAUNDERS, D.A., ed. Wheat, for the nontraditional, warm areas. Mexico: CIMMYT, 1991. p.242-256.
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