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In general, tropical soils present low natural fertility, which results in a great
amount of degraded areas if it is associated with improper handling. Sewage
sludge, due to its high levels of organic matter and nutrients, can improve soil
properties. Thus, this study evaluated the conditioning and fertilizing effects
of sewage sludge on the attributes of a typical dystrophic latosol in Southern
Minas Gerais. The experiment evaluated the application of sludge from
Santana wastewater treatment plant in Varginhas (Minas Gerais, Brazil) in
pots, with concentrations equivalent to 60, 120, and 180 t ha-1, and a control
treatment without sludge. The sewage sludge has increased the levels of
organic matter, cation-exchange capacity, sum of the bases and nutrients,
as well as increased porosity and decreased soil density, thus indicating the
potential for conditioning and fertilizing agricultural soils.
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