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

Figure 10

Total concentrations, extracted with DTPA and extracted with deionized water, of Cu, Pb, and Zn during the composting of cattle manure and tree litter in IBM and NMB piles. Between points on the lines with different letters the differences are statistically significant ( < 0.05).

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)