The study aimed to quantify Cd, Cr, Cu, Ni, Pb, Zn, Al, Fe, and Mn concentrations in soils due to cemetery occupation in the Brazilian Amazon in order to assess the potential of environmental contamination. Atotal of 45 samples were collected in the 0.00–0.40, 0.40–0.80, and 0.80–1.20m layers, with trenches opened in a Gleysol (Cemetery - I) and Cambisol (Cemetery - II) to determine Fe, Al, Mn, Cr, Cu, Cd, Ni, Pb, and Zn contents. Chemical and particle size analyses were also performed. Soil sample digestion was based on the EPA 3051A method and metal concentrations were determined by ICP-OES. The results were submitted to descriptive statistics, control charts, and multivariate statistics by principal components. The effective increase in Fe, Cr, Cu, Ni, Pb, and Zn concentrations indicates ahigher potential of contamination by these metals due to cemetery activity, with concentrations above the recommended reference values for Brazilian Amazon sediment soils. Soil shows ability to return, resilience, to the chemical quality and natural concentrations of potentially toxic elements with the inactivation of cemetery activities. The clay fraction and organic matter are the main coordinators of metal dynamics in soil profiles.

The process of converting natural ecosystems in cultivated areas, as well as use and land management systems have provided changes in aggregate stability and soil carbon stocks levels. The objective of this work was to evaluate the stability of aggregates and carbon stock in areas under forest conversion to different cropping systems, using statistical tools. Grids were established according to the culture dimensions, samples were taken at the crossing points of the grids at depths 0.00–0.05; 0.05–0.10; and 0.10–0.20 m, with 80 sampling points in each area, totaling 240 per area. At each sampling point, samples were collected with a preserved structure in the shape of a clod to determine the physical and chemical attributes, with a total of 960 samples in the four areas evaluated. The conversion process influenced soil aggregation, as measured by increased clay fraction dispersion and decreased WAD, GAD and aggregate classes >2.00 mm; The attributes were shown at the limit of the degree of spatial dependence, varying from moderate to strong; In the multivariate analysis, the forest and cupuaçu areas presented similar behavior, with values of OC, CS, silt, clay and classes of aggregates 2–1 mm, <1mm and ASI, above average.