ABSTRACT Given the influence of edaphic macrofauna in the physical, chemical, and biological processes that sustain the organic matter cycle in the soil of tropical ecosystems, this study aimed to evaluate the effect of the sequence: Secondary Forest – Pasture – Eucalyptus monoculture on the macrofauna structure in Southeast of Pará State, Brazil. In each land use system, two 350 m transect were taken. The data was collected in 8 sampling sites, which were 50 m apart in each transect […]

Humic substances (HS) are the main pool of total soil organic carbon (TOC). They are partitioned in different fractions according to its solubility in alkali or acid medium, which can be related to soil type and management. This work aimed to compare HS partitioning in Brazilian soils according to soil depth, soil type, biome, and land uses. In a literature review of theses, dissertations, journal articles, and abstracts in proceedings, quantitative data on TOC partitioning in humic acids (HA), fulvic […]