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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
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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
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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 1999

Autor: Thomas, Richard J. Ayarza, Miguel Angel
Enlace original: https://cgspace.cgiar.org/handle/10568/54288

Investigación en Agricultura
Enlace permanente

Thomas, Richard J. ,  Ayarza, Miguel Angel ,  [Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality] ,  Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality
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
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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
Report 1993

Autor: Thomas, Richard J. Fisher, Myles J. Ayarza, Miguel Angel Sanz Scovino, José Ignacio
Enlace original: https://cgspace.cgiar.org/handle/10568/71594

Investigación en Agricultura
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Thomas, Richard J. ,  Fisher, Myles J. ,  Ayarza, Miguel Angel ,  Sanz Scovino, José Ignacio ,  [Productivity of acid tropical soils in Latin America and the role of forage grasses and legumes] ,  Productivity of acid tropical soils in Latin America and the role of forage grasses and legumes
Report 1996

Autor: Smith, J. Cadavid Herrera, JV Ayarza, Miguel Angel Agiar, J.L.P.

The technological and institutional requirements needed for a broader distribution and adoption of new cropping technologies are indicated, using as example the case of changes in land use by soybean growers of the Brazilian Cerrados. In Brazil, soybean had contributed significantly to economic d...

Enlace original: https://cgspace.cgiar.org/handle/10568/71589

Investigación en Agricultura
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Smith, J. ,  Cadavid Herrera, JV ,  Ayarza, Miguel Angel ,  Agiar, J.L.P. ,  [Adoption of resource management technologies : lessons from the Brazilian savanna] ,  Adoption of resource management technologies : lessons from the Brazilian savanna

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