Applied and Environmental Soil Science

Research Article

Bioavailability and Solubility of Heavy Metals and Trace Elements during Composting of Cow Manure and Tree Litter

Table 7

Negative values of Pearson’s correlation between primary variables and the AH, with significance without influence of the inoculation factor.
Primary variable (mg · kg−1)Secondary physicochemical variable (%)nPearson value
[Cu]H2OHA30−0.84105.94 × 10−9
[Se]DTPAHA30−0.83827.45 × 10−9
[Ni]DTPAHA30−0.76807.26 × 10−7
[Ni]H2OHA30−0.75501.43 × 10−6
[Zn]H20HA30−0.73773.29 × 10−6
[Cd]H2OHA30−0.67055.04 × 10−5
[Hg]DTPAHA30−0.66156.88 × 10−5
[Pb]H2OHA30−0.62692.10 × 10−4
[Se]H2OHA30−0.62662.12 × 10−4
[Hg]H2OHA30−0.52013.22 × 10−3
[·] total concentration; [·]DTPA: concentration extracted with pentatetic acid; [·]H2O: concentration extracted with deioized water; HA: fraction of humic acids.