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Book Chapter 1999

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

In the Brazilian savannas, or Cerrados the rapid advance in agriculture and cattle ranching is affecting soils through, for example, accelerated erosion and depletion of soil organic matter (SOM). Changes in soil microbial biomass are good indicators of changes in SOM. We therefore assessed the e...

Enlace original: https://cgspace.cgiar.org/handle/10568/55138

Investigación en Agricultura
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Renz, TE ,  Neufeldt, Henry ,  Ayarza, Miguel Angel ,  Resck, DVS ,  Zech, W. ,  [Microbial biomass, microbial activity, and carbon pools under different land-use systems in the Brazilian cerrados] ,  Microbial biomass, microbial activity, and carbon pools under different land-use systems in the Brazilian cerrados
Book Chapter 1999

Autor: Lopes, A Ayarza, Miguel Angel Thomas, Richard J.
Enlace original: https://cgspace.cgiar.org/handle/10568/55106

Investigación en Agricultura
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Lopes, A ,  Ayarza, Miguel Angel ,  Thomas, Richard J. ,  [Sistemas agropastoriles en las sabanas de América Tropical: lecciones del desarrollo agrícola de los Cerrados de Brasil] ,  Sistemas agropastoriles en las sabanas de América Tropical: lecciones del desarrollo agrícola de los Cerrados de Brasil
Book Chapter 1999

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

Short-term changes in soil aggregation, total and particulate organic C and N were studied in cropping and pasture systems of the Brazilian savannas, also known as the Cerrados. Furthermore, the concepts of a hierarchical aggregate structure and of the interaction of soil structure with particula...

Enlace original: https://cgspace.cgiar.org/handle/10568/55129

Investigación en Agricultura
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Freibauer, A. ,  Westerhof, R ,  Ayarza, Miguel Angel ,  Silva, J.E. da ,  Zech, W. ,  [Short-term variation in aggregation and particulate organic matter under crops and pastures] ,  Short-term variation in aggregation and particulate organic matter under crops and pastures
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: 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
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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

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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
Brief 2001

Autor: Jiménez Jaén, J.J. Barrios, E. Ayarza, Miguel Angel Lavelle, Patrick M. Decaëns, Thibaud
Enlace original: https://cgspace.cgiar.org/handle/10568/70559

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Jiménez Jaén, J.J. ,  Barrios, E. ,  Ayarza, Miguel Angel ,  Lavelle, Patrick M. ,  Decaëns, Thibaud ,  [Harnessing the biological plows of the soil: soil macrofauna communities] ,  Harnessing the biological plows of the soil: soil macrofauna communities
Journal Article 1994

Autor: Rao, Idupulapati M. Ayarza, Miguel Angel Thomas, Richard J.

Soil carbon distribution with depth, stable carbon isotope ratios in soil organic matter and their changes as a consequence of the presence of legume were studied in three 12-year-old tropical pastures (grass alone Brachiaria decumbens (C4), legume alone Pueraria phaseoloides (C3) and grass + l...

Enlace original: https://cgspace.cgiar.org/handle/10568/44183

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Rao, Idupulapati M. ,  Ayarza, Miguel Angel ,  Thomas, Richard J. ,  [The use of carbon isotope ratios to evaluate legume contribution to soil enhancement in tropical pastures] ,  The use of carbon isotope ratios to evaluate legume contribution to soil enhancement in tropical pastures
Book Chapter 1992

Autor: Rao, Idupulapati M. Ayarza, Miguel Angel Thomas, Richard J. Fisher, Myles J. Sanz Scovino, José Ignacio Spain, James M. Lascano, Carlos E.
Enlace original: https://cgspace.cgiar.org/handle/10568/55065

Investigación en Agricultura
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Rao, Idupulapati M. ,  Ayarza, Miguel Angel ,  Thomas, Richard J. ,  Fisher, Myles J. ,  Sanz Scovino, José Ignacio ,  Spain, James M. ,  Lascano, Carlos E. ,  [Soil-plant factors and processes affecting productivity in ley farming] ,  Soil-plant factors and processes affecting productivity in ley farming
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
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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

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