Changes in tropical land use have profound effects on soil organic matter (SOM) status. It
has been suggested that alterations in the different fractions of SOM are more effective in …

O presente estudo objetiva apresentar uma síntese do atual conhecimento sobre os
conceitos e fundamentos das substâncias húmicas, métodos de extração, fracionamento …

Carbon (C) stabilization and the quality of soil organic matter (SOM) in a tropical climate are
key aspects regulating carbon dioxide emissions and maintaining the C cycle. Soil …

Espinhaço and Mantiqueira are two mountain ranges of great importance in Brazil. In the
uppermost parts of these areas, unique ecosystems occur, generally associated with rock …

Land-use change (LUC) from native vegetation to feedstock production is the main
responsible for the losses of carbon (C) from soil organic matter (SOM) to atmosphere. We …

Na determinação dos teores de carbono (C) em resíduos orgânicos, são utilizadas
variações de marchas analíticas empregadas para solos, sem a necessária calibração …

Between the 1940s and 1990s, immeasurable amounts of organochlorine pesticides (OCPs)
were used in endemic disease control campaigns and agriculture in the tropical semi-arid …

The growth of broiler meat production chain in Brazil has resulted in a strong increase in the
wastes produced either at the pre-finishing stages (reproductive poultry litter and hatchery …

Vários fatores controlam a velocidade de decomposição e a liberação de nutrientes por
resíduos orgânicos. Dentre esses fatores, destacam-se o grau de humificação e a natureza …

Fertility properties, total C (Ctot), and chemical soil organic matter fractions (fulvic acid
fraction-FA, humic acid fraction-HA, humin fraction-H) of anthropogenic dark earths (Terra …