Descubre y comparte nuestro conocimiento público

Se han encontrado 36 recursos

Resultados de búsqueda

Lopes, AAyarza, Miguel AngelThomas, 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

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...


Freibauer, A.Westerhof, RAyarza, Miguel AngelSilva, J.E. daZech, 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

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...


Lilienfein, JWilcke, W.Neufeldt, HenryAyarza, Miguel AngelZech, 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

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...


Westerhof, RVilela, LAyarza, Miguel AngelZech, W.[Carbon fractions as sensitive indicators of quality of soil organic matter]Carbon fractions as sensitive indicators of quality of soil organic matter

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...


Neufeldt, HenryResck, DVSAyarza, Miguel AngelZech, W.[Soil organic matter in oxisols of the Brazilian cerrados]Soil organic matter in oxisols of the Brazilian cerrados

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...


Neufeldt, HenryAyarza, Miguel AngelResck, DVSZech, 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

De acuerdo con las demográficas actuales, se prevé que la población en América tropical se duplicara en los próximos 25 años; como consecuencia, habrá mayor demanda de carne y leche, la cual podrá satisfacerse solo aumentando la producción agropecuaria. Estos factores aumentaran la presión sobre ...


Ayarza, Miguel AngelRao, Idupulapati M.Thomas, Richard J.[Reciclaje de nutrimentos en pastizales tropicales de suelos ácidos]Reciclaje de nutrimentos en pastizales tropicales de suelos ácidos
Castro, AracelyPoveda, OscarGarcía, EdwinPavón Tijerino, Jellin del CarmenAyarza, Miguel AngelRao, Idupulapati M.[Farmer-to-farmer dissemination of alternative to slash and burn agriculture (round 2)]Farmer-to-farmer dissemination of alternative to slash and burn agriculture (round 2)
Welchez, L.A.Ayarza, Miguel AngelAmézquita Collazos, EdgarBarrios, E.Rondón, Marco AntonioCastro, A.Rivera, M.Rao, Idupulapati M.Pavón, J.Ferreira, OscarValladares, D.Sánchez, N.[No-burn agricultural zones on Honduran hillsides: Better harvests air quality and water availability by way of improved land management]No-burn agricultural zones on Honduran hillsides: Better harvests air quality and water availability by way of improved land management
Rao, Idupulapati M.Ayarza, Miguel AngelThomas, Richard J.Fisher, Myles J.Sanz Scovino, José IgnacioSpain, 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

Selecciona los documentos para visualizarlos

Nombre del archivo Ver recurso