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Journal Article 1999

Autor: Lilienfein, J Wilcke, W. Ayarza, Miguel Angel Lima, SC Vilela, L Zech, W.

Sustainable land use in periodically dry Brazilian savannas requires a water-saving management. We hypothesized that the annual course of matric potentials (?M) in very-fine, isohyperthermic Anionic Acrustoxes of Pinus plantations (PI), degraded (DP) and productive pastures (PP), no-till (NT) and...

Enlace original: https://cgspace.cgiar.org/handle/10568/43185

Investigación en Agricultura
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Lilienfein, J ,  Wilcke, W. ,  Ayarza, Miguel Angel ,  Lima, SC ,  Vilela, L ,  Zech, W. ,  [Annual course of matric potential in differently used savanna oxisols in Brazil] ,  Annual course of matric potential in differently used savanna oxisols in Brazil
Journal Article 2003

Autor: Lilienfein, J Wilcke, W. Vilela, L Ayarza, Miguel Angel Carmo Lima, S. do Zech, W.

In the Brazilian savanna, there is a risk that soil fertility of pastures declines to a level below that of the native savanna because of low fertilizer application. To evaluate biophysical pasture sustainability we compared regularly fertilized productive pasture (PP), degraded pasture fertilize...

Enlace original: https://cgspace.cgiar.org/handle/10568/44110

Investigación en Agricultura
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Lilienfein, J ,  Wilcke, W. ,  Vilela, L ,  Ayarza, Miguel Angel ,  Carmo Lima, S. do ,  Zech, W. ,  [Soil fertility under native cerrado and pasture in the Brazilian savanna] ,  Soil fertility under native cerrado and pasture in the Brazilian savanna
Journal Article 1994

Autor: Fisher, Myles J. Rao, Idupulapati M. Ayarza, Miguel Angel Lascano, Carlos E. Sanz Scovino, José Ignacio Thomas, Richard J. Vera, Raúl R.
Enlace original: https://cgspace.cgiar.org/handle/10568/77749

Investigación en Agricultura
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Fisher, Myles J. ,  Rao, Idupulapati M. ,  Ayarza, Miguel Angel ,  Lascano, Carlos E. ,  Sanz Scovino, José Ignacio ,  Thomas, Richard J. ,  Vera, Raúl R. ,  [Carbon storage by introduced deep-rooted grasses in the South American savannas] ,  Carbon storage by introduced deep-rooted grasses in the South American savannas
Book Chapter 2013

Autor: Amézquita Collazos, Edgar Rao, Idupulapati M. Rondón, Marco Antonio Ayarza, Miguel Angel Hoyos, P. Molina, DL Corrales, I.I.
Enlace original: https://cgspace.cgiar.org/handle/10568/55634

Investigación en Agricultura
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Amézquita Collazos, Edgar ,  Rao, Idupulapati M. ,  Rondón, Marco Antonio ,  Ayarza, Miguel Angel ,  Hoyos, P. ,  Molina, DL ,  Corrales, I.I. ,  [Mejoramiento de oxisoles de baja fertilidad para sistemas agropastoriles de alta productividad en sabanas tropicales de Colombia] ,  Mejoramiento de oxisoles de baja fertilidad para sistemas agropastoriles de alta productividad en sabanas tropicales de Colombia
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 Buurman, P Griethuysen, C. van Ayarza, Miguel Angel Vilela, L Zech, W.

In the Cerrados, a large savanna region in Brazil, the effects of different land use on aggregation in Oxisols were studied, using laser diffraction grain-size analyses. The topsoil of plowed systems had significantly fewer macroaggregates (194-2000 micro m) and a significantly larger fraction of...

Enlace original: https://cgspace.cgiar.org/handle/10568/55128

Investigación en Agricultura
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Westerhof, R ,  Buurman, P ,  Griethuysen, C. van ,  Ayarza, Miguel Angel ,  Vilela, L ,  Zech, W. ,  [Aggregation studied by laser diffraction in relation to plowing, soil organic matter, and lime in the Brazilian cerrados] ,  Aggregation studied by laser diffraction in relation to plowing, soil organic matter, and lime in the Brazilian cerrados
Book Chapter 1999

Autor: Friesen, Dennis K. Ayarza, Miguel Angel Thomas, Richard J. Amézquita Collazos, Edgar Sanz Scovino, José Ignacio
Enlace original: https://cgspace.cgiar.org/handle/10568/55116

Investigación en Agricultura
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Friesen, Dennis K. ,  Ayarza, Miguel Angel ,  Thomas, Richard J. ,  Amézquita Collazos, Edgar ,  Sanz Scovino, José Ignacio ,  [Strategic systems research for the Latin American savannas] ,  Strategic systems research for the Latin American savannas

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