Determination of Poultry Manure and Plant Residues Effects on Zn Bioavailable Fraction in Contaminated Soil via DGT Technique.

A greenhouse experiment aimed to assess the effects of poultry manure, sorghum, and clover residues (0 and 15 g kg) on the zinc (Zn) bioavailable fraction in contaminated calcareous soil using two chemical assays, including diffusion gradient in thin-films (DGT) and diethylene triamine pentaacetic acid-triethanolamine (DTPA-TEA), and a bioassay with corn (Zea mase L.). The results showed that poultry manure, clover, and sorghum residues application increased dissolved organic carbon (DOC) by 53.