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We tested the effect of an addition of organic matter (OM: 10% of a mixture of coconut bran and cattle dung) and/or earthworm inoculation (15g fresh weight kg−1 soil) in a soil polluted by metals on microbial activities and concentrations of metal DTPA extractable fractions. The experiment, conducted under laboratory conditions, lasted for 60days. Soil organic C and total N in control were 15.3and...
Eight soil samples were taken along a gradient of metal contamination, from a heavy metals contaminated pasture that was polluted by the disposal of wastes of metallurgic industry that occurred 70 years ago. The concentrations of heavy metals (Zn, Cd, Pb and Cu) were estimated by total contents and DTPA-extractions. The total contents of the heavy metals ranged from 108 to 1231mgZnkg -1 ...
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