Table 3: Selected characteristics and metal concentrations in the studied amendments.

PropertiesOrganic amendmentsInorganic amendments
WHRSCSBFACFABSBFLCaCO3

pH6.187.605.629.6812.59.2412.598.81
EC, dSm−16.912.832.010.984.481.131.550.17
OM, %75.2552.797.49
CaCO3, %12.481.6
Total elements, mg kg−1
 Fe7590.021228.059750.0651.5
 Mn78.35202.9618.518.9
 Zn111.428.665.05.5555.1108.2526.4037.0
 Cu60.898.647.14.3030.133.709.7041.1
 Cdndndndnd2.151.353.45nd
 Ni8.8170.950.3513.10
 Pb8.668.416.062.534.557.00

CFA: coal fly ash, B: bentonite, SBFL: sugar beet factory lime, RS: rice straw, WH: water hyacinth, CS: cotton stalks, nd: not detected, —: not measured.