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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

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

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

Existen varias formas para reducir las emisiones de gases de efecto invernadero (GEI) que ocasionan el cambio climático. En este documento se analiza una propuesta específica para la reducción de emisiones de GEI consistente en la subasta de bonos de carbono. Este esquema ha sido utilizado en alg...


Castañeda Sabido, AlejandroVillagómez Amezcua, AlejandroPropuesta de subasta de bonos de carbono para Chile y México

En las últimas décadas han surgido importantes desafíos ambientales para la humanidad y la manera cómo habita el planeta. Consecuentemente, el sistema económico predominante ha incentivado, en poco tiempo, que en ciertos países el medio ambiente se haya convertido en un actor importante de market...


The effect of low phosphate supply (low P) was determined on the diurnal changes in the rate of carbon export, and on the contents of starch, sucrose, glucose, and fructose 2,6-bisphosphate (F2,6BP) in leaves. Low-P effects on the activities of a number of enzymes involved in starch and sucrose m...


Rao, Idupulapati M.Terry, Norman[Leaf phosphate status, photosynthesis and carbon partitioning in sugar beet]Leaf phosphate status, photosynthesis and carbon partitioning in sugar beet

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...


Rao, Idupulapati M.Ayarza, Miguel AngelThomas, 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
Piikki, KWinowiecki, Leigh A.Vågen, Tor-GunnarParker, LSöderström, Mats[The importance of soil fertility constraints in modeling crop suitability under progressive climate change in Tanzania]The importance of soil fertility constraints in modeling crop suitability under progressive climate change in Tanzania

The soil organic carbon (SOC) dynamic is a key element of soil fertility in savannah ecosystems that form the key agricultural lands in sub-Saharan Africa. In the western part of Burkina Faso, the land use is mostly linked to cotton-based cropping systems. Use of mechanization, pesticides, and he...


Ouattara, BOuattara, K.Serpantie, G.Mando, ASedogo, MPBationo, B. André[Intensity cultivation induced effect on soil organic carbon dynamic in the western cotton area of Burkuna Faso]Intensity cultivation induced effect on soil organic carbon dynamic in the western cotton area of Burkuna Faso
Quintero, MarcelaComerford, N.B.[Effects of conservation tillage on total and aggregated soil organic carbon in the Andes]Effects of conservation tillage on total and aggregated soil organic carbon in the Andes

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