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3332344 
Journal Article 
Tropical agriculture and global warming: Impacts and mitigation options 
Cerri, CEP; Sparovek, G; Bernoux, M; Easterling, WE; Melillo, JM; Cerri, CC 
2007 
1 
Scientia Agricola
ISSN: 0103-9016
EISSN: 1678-992X 
64 
1 
83-99 
WOS:000244736100013 
The intensive land use invariably has several negative effects on the environment and crop production if conservative practices are not adopted. Reduction in soil organic matter (SOM) quantity means gas emission (mainly CO(2), CH(4), N(2)O) to the atmosphere and increased global warming. Soil sustainability is also affected, since remaining SOM quality changes. Alterations can be verified, for example, by soil desegregation and changes in structure. The consequences are erosion, reduction in nutrient availability for the plants and lower water retention capacity. These and other factors reflect negatively on crop productivity and sustainability of the soil -plant-atmosphere system. Conversely, adoption of "best management practices", such as conservation tillage, can partly reverse the process - they are aimed at increasing the input of organic matter to the soil and/or decreasing the rates at which soil organic matter decomposes. 
Brazil; climate change; greenhouse effect; soil organic matter; management practices