Mg Ca K Na NH4-N Soil Columns
33.19 54.30 4.09 1.70 0.14 Control soil
34.08 70.52 13.71 7.73 3.77 Sewage sludge 1%
28.25 62.15 26.43 16.17 12.40 Sewage sludge 3%
26.11 71.55 39.36 28.03 24.11 Sewage sludge 5%
40.40 61.10 29.70 22.20 1.23 Poultry manure 1%
29.14 70.79 73.89 54.00 3.37 Poultry manure 3%
43.79 57.12 209.97 93.38 10.22 Poultry manure 5%