Descubre y comparte nuestro conocimiento público

Se han encontrado 21 recursos

Resultados de búsqueda

Book Chapter 1999

Autor: Lilienfein, J Wilcke, W. Neufeldt, Henry Ayarza, Miguel Angel Zech, W.

This study assessed the influence of land use (continuous cropping, CC; tree plantations, F; pasture, PG; and native savanna, NS) on P concentrations and partitioning in bulk soil and two aggregate size fractions of two Oxisols, one loamy and one clayey. The quantity and quality of physically pro...

Enlace original: https://cgspace.cgiar.org/handle/10568/55136

Investigación en Agricultura
Enlace permanente
Lilienfein, J ,  Wilcke, W. ,  Neufeldt, Henry ,  Ayarza, Miguel Angel ,  Zech, W. ,  [Phosphorus pools in bulk soil and aggregates of differently textured oxisols under different land-use systems in the Brazilian cerrados] ,  Phosphorus pools in bulk soil and aggregates of differently textured oxisols under different land-use systems in the Brazilian cerrados
Book Chapter 1999

Autor: Westerhof, R Vilela, L Ayarza, Miguel Angel Zech, W.

Soil organic matter quality is usually seen as a major attribute of soil quality. In this study, we extracted organic carbon with water (WEOC) or with potassium permanganate (PEOC). We assessed these extractions for their potential as sensitive indicators of the effect of land use on two importan...

Enlace original: https://cgspace.cgiar.org/handle/10568/55132

Investigación en Agricultura
Enlace permanente
Westerhof, R ,  Vilela, L ,  Ayarza, Miguel Angel ,  Zech, W. ,  [Carbon fractions as sensitive indicators of quality of soil organic matter] ,  Carbon fractions as sensitive indicators of quality of soil organic matter
Book Chapter 1999

Autor: Neufeldt, Henry Zech, W. Thomas, Richard J.
Enlace original: https://cgspace.cgiar.org/handle/10568/55126

Investigación en Agricultura
Enlace permanente
Neufeldt, Henry ,  Zech, W. ,  Thomas, Richard J. ,  [Introduction: sustainable land management for the oxisols of the Brazilian cerrados] ,  Introduction: sustainable land management for the oxisols of the Brazilian cerrados
Book Chapter 1999

Autor: Neufeldt, Henry Resck, DVS Ayarza, Miguel Angel Zech, W.

Little is known about the sustainability of cultivation systems in the Brazilian savannas, also known as the Cerrados, despite its increasing significance for that country`s agriculture. To characterize management effects and follow alterations of organic compounds in different fractions, we stud...

Enlace original: https://cgspace.cgiar.org/handle/10568/55130

Investigación en Agricultura
Enlace permanente
Neufeldt, Henry ,  Resck, DVS ,  Ayarza, Miguel Angel ,  Zech, W. ,  [Soil organic matter in oxisols of the Brazilian cerrados] ,  Soil organic matter in oxisols of the Brazilian cerrados
Book Chapter 1999

Autor: Neufeldt, Henry Ayarza, Miguel Angel Resck, DVS Zech, W.

The effects of land-use change on the structure of Oxisols in the Brazilian savannas (also known as the Cerrados) are still insufficiently understood. We therefore studied loamy and clayey Oxisols under natural savanna, crop, pasture, and reforestation to (1) quantify management-induced changes i...

Enlace original: https://cgspace.cgiar.org/handle/10568/55127

Investigación en Agricultura
Enlace permanente
Neufeldt, Henry ,  Ayarza, Miguel Angel ,  Resck, DVS ,  Zech, W. ,  [Distribution of water-stable aggregates and aggregating agents in oxisols of the Brazilian cerrados] ,  Distribution of water-stable aggregates and aggregating agents in oxisols of the Brazilian cerrados
Journal Article 1998

Autor: Westerhof, R Vilela, L Ayarza, Miguel Angel Zech, W.

The effect of land use on the availability of nitrogen (N) was studied by separating total N into a labile and a stable fraction by oxidation and extraction of labile N with KMnO4. The nitrogen management index (NMI) was calculated following the method of Blair et al. (1995) for the carbon manage...

Enlace original: https://cgspace.cgiar.org/handle/10568/43628

Investigación en Agricultura
Enlace permanente
Westerhof, R ,  Vilela, L ,  Ayarza, Miguel Angel ,  Zech, W. ,  [Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil] ,  Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil
Journal Article 2000

Autor: Neufeldt, Henry Silva, J.E. da Ayarza, Miguel Angel Zech, W.

Differently managed oxisols from Central Brazil were studied using a sequential P fractionation procedure because the effects of land use on the distribution of P forms in these soils are barely known. Therefore levels of labile and recalcitrant P forms in the natural Cerrado savanna were compare...

Enlace original: https://cgspace.cgiar.org/handle/10568/43630

Investigación en Agricultura
Enlace permanente
Neufeldt, Henry ,  Silva, J.E. da ,  Ayarza, Miguel Angel ,  Zech, W. ,  [Land-use effects on phosphorus fractions in cerrado oxisols] ,  Land-use effects on phosphorus fractions in cerrado oxisols
Book Chapter 1999

Autor: Renz, TE Neufeldt, Henry Ayarza, Miguel Angel Silva, J.E. da Zech, W.

Plant production in the Brazilian savannas, also known as the Cerrados, is limited mainly by low P availability. In tropical soils, rich in sesquioxides, P supply of plants depends heavily on the transformation of organic P by phosphatase enzymes into HPO 4 2- and H 2 PO 4-. We examined two Oxiso...

Enlace original: https://cgspace.cgiar.org/handle/10568/55137

Investigación en Agricultura
Enlace permanente
Renz, TE ,  Neufeldt, Henry ,  Ayarza, Miguel Angel ,  Silva, J.E. da ,  Zech, W. ,  [Acid monophosphatase: an indicator of phosphorus mineralization or of microbial activity? A case study from the Brazilian cerrados] ,  Acid monophosphatase: an indicator of phosphorus mineralization or of microbial activity? A case study from the Brazilian cerrados
Book Chapter 1999

Autor: Westerhof, R Silva, J.E. da Ayarza, Miguel Angel Zech, W.

We examined whole-soil samples and particle-size fractions to study the distribution of different phosphorus (P) fractions after land-use change from native savanna to crops, pasture, and reforestation on clayey and loamy Oxisols of the Brazilian savannas. Phosphorus was extracted sequentially, a...

Enlace original: https://cgspace.cgiar.org/handle/10568/55135

Investigación en Agricultura
Enlace permanente
Westerhof, R ,  Silva, J.E. da ,  Ayarza, Miguel Angel ,  Zech, W. ,  [Phosphorus fractions under different land-use systems in oxisols of the Brazilian cerrados] ,  Phosphorus fractions under different land-use systems in oxisols of the Brazilian cerrados
Book Chapter 2003

Autor: Guggenberger, G Thomas, Richard J. Zech, W.
Enlace original: https://cgspace.cgiar.org/handle/10568/55478

Investigación en Agricultura
Enlace permanente
Guggenberger, G ,  Thomas, Richard J. ,  Zech, W. ,  [Materia orgánica del suelo contenida en las heces que produce una comunidad de lombrices anécico-endógea de un pastizal tropical, en Colombia] ,  Materia orgánica del suelo contenida en las heces que produce una comunidad de lombrices anécico-endógea de un pastizal tropical, en Colombia

Selecciona los documentos para visualizarlos

Nombre del archivo Ver recurso
Marcar todos
Limpiar todo