Papers

Summary

Better knowledge about anthropogenic soils can help in the construction of future scenarios for the Amazon region, through information that supports sustainable planning. The objective of this work was to evaluate the spatial variability of physical attributes of anthropogenic and non - anthropogenic soils in the region of Manicoré, AM. In the study area two were selected, one with non-anthropogenic soils (native forest) and the other with anthropogenic soils (black archeological soil). In each area, a mesh measuring 70 x 70 m was established and the soils were sampled at the crossing points of the mesh, with regular spacings of 10 in 10 meters, making a total of 64 sampling points in each landscape. Soil samples were collected at depths of 0.0 to 0.10 m and physical analyzes (texture, soil density, macroporosity, microporosity, total porosity and aggregate stability) were performed. The data were then submitted to descriptive and geostatistical statistics. It was verified that the anthropogenic and non-anthropogenic soils showed different behaviors in relation to their spatial structures. The spatial variability that prevailed in anthropogenic and non-anthropogenic soils was moderate and weak, indicating that these soils are strongly linked to changes caused by extrinsic factors in the soil. In the anthropogenic soil, better results were observed for total porosity, microporosity and soil density, showing superior characteristics for agronomic purposes when compared to non - anthropogenic soil. And the range values found in the two areas were higher than those used in the mesh, evidencing greater spatial continuity in these environments