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Amézquita Collazos, EdgarRao, Idupulapati M.Rondón, Marco AntonioAyarza, Miguel AngelHoyos, P.Molina, DLCorrales, 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

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...


Renz, TENeufeldt, HenryAyarza, Miguel AngelResck, DVSZech, 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
Rao, Idupulapati M.Barrios, E.Oberson, AstridAyarza, Miguel AngelFriesen, Dennis K.[Opportunities for increasing the efficiency of phosphorus use in tropical agroecosystems]Opportunities for increasing the efficiency of phosphorus use in tropical agroecosystems

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

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...


Renz, TENeufeldt, HenryAyarza, Miguel AngelSilva, J.E. daZech, 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
Thomas, Richard J.Rondón, Marco AntonioAmézquita Collazos, EdgarAyarza, Miguel AngelAsakawa, N.Friesen, Dennis K.[Overcoming soil constraints in Latin American Savannas: new approaches and potential trade-offs]Overcoming soil constraints in Latin American Savannas: new approaches and potential trade-offs
Amézquita Collazos, EdgarRao, Idupulapati M.Bernal Riobo, Jaime HumbertoBarrios, E.Rondón, Marco AntonioAyarza, Miguel Angel[Management of acid soils in the Llanos of Colombia]Management of acid soils in the Llanos of Colombia

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