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Book Chapter 2012

Autor: Peters, Michael Rao, Idupulapati M. Fisher, Myles J. Subbaraoa, Guntur V. Martens, S Herrero, G. Tiemann, Tassilo T. Ayarza, Miguel Angel Hyman, Glenn
Enlace original: https://cgspace.cgiar.org/handle/10568/55611

Investigación en Agricultura
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Peters, Michael ,  Rao, Idupulapati M. ,  Fisher, Myles J. ,  Subbaraoa, Guntur V. ,  Martens, S ,  Herrero, G. ,  Tiemann, Tassilo T. ,  Ayarza, Miguel Angel ,  Hyman, Glenn ,  [Tropical forage-based systems to mitigate greenhouse gas emissions] ,  Tropical forage-based systems to mitigate greenhouse gas emissions
Book Chapter 2007

Autor: Ayarza, Miguel Angel Amézquita Collazos, Edgar Rao, Idupulapati M. Barrios, Edmundo Rondón, Marco Antonio Rubiano Sanabria, Yolanda Quintero, Marcela
Enlace original: https://cgspace.cgiar.org/handle/10568/77837

Investigación en Agricultura
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Ayarza, Miguel Angel ,  Amézquita Collazos, Edgar ,  Rao, Idupulapati M. ,  Barrios, Edmundo ,  Rondón, Marco Antonio ,  Rubiano Sanabria, Yolanda ,  Quintero, Marcela ,  [Advances in improving agricultural profitability and overcoming land degradation in savanna and hillside agroecosystems of tropical America] ,  Advances in improving agricultural profitability and overcoming land degradation in savanna and hillside agroecosystems of tropical America
Book Chapter 1999

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

The effect of land use on the availability of soil nitrogen (N) was studied by separating total soil N into one labile and one stable fraction by oxidation and extraction of labile N with potassium permanganate. The nitrogen management index (NMI) was calculated according to Blair et al. (1995) f...

Enlace original: https://cgspace.cgiar.org/handle/10568/55133

Investigación en Agricultura
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Westerhof, R ,  Vilela, L ,  Ayarza, Miguel Angel ,  Zech, W. ,  [Labile N and the nitrogen management index of oxisols in the Brazilian cerrados] ,  Labile N and the nitrogen management index of oxisols in the Brazilian cerrados
Book Chapter 1999

Autor: Fuhrmann, S Neudelft, H Westerhof, R Ayarza, Miguel Angel Silva, J.E. da Zech, W.

Intensive farming and grazing on Oxisols of the Brazilian savannas (also known as the Cerrados) are leading to loss of soil organic matter (SOM) and consequently to a decline in fertility and sustainability of the soils. Alternative land-use systems such as the introduction of legumes in pastures...

Enlace original: https://cgspace.cgiar.org/handle/10568/55131

Investigación en Agricultura
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Fuhrmann, S ,  Neudelft, H ,  Westerhof, R ,  Ayarza, Miguel Angel ,  Silva, J.E. da ,  Zech, W. ,  [Soil organic carbon, carbohydrates, amino sugars, and potentially mineralizable nitrogen under different land-use systems in oxisols of the Brazilian cerrados] ,  Soil organic carbon, carbohydrates, amino sugars, and potentially mineralizable nitrogen under different land-use systems in oxisols of the Brazilian cerrados
Book Chapter 1999

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

The permanganate oxidation procedure is easily performed and may help monitor large areas for their soil organic matter (SOM) quality and nitrogen (N) availability. Knowledge of the chemical characteristics of fractions that are lost or remain after oxidation will help explain results obtained by...

Enlace original: https://cgspace.cgiar.org/handle/10568/55134

Investigación en Agricultura
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Westerhof, R ,  Vilela, L ,  Ayarza, Miguel Angel ,  Zech, W. ,  [Characterization labile and stable nitrogen] ,  Characterization labile and stable nitrogen
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
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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
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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 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
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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
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

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