Mg2+ + 2X- = MgX2 Ca2+ + 2X- = CaX2 K+ + X- = KX Na+ + X- = NaX AmmH+ + X- = AmmHX Soil Columns
1.60 2.10 2.20 2.20 2.20 Control soil
1.00 1.30 1.50 1.20 0.70 Sewage sludge 1%
0.60 0.80 0.90 0.60 0.40 Sewage sludge 3%
0.60 0.80 0.70 0.70 0.30 Sewage sludge 5%
0.90 1.40 0.70 0.70 0.90 Poultry manure 1%
0.30 0.40 0.30 0.00 0.30 Poultry manure 3%
0.60 0.80 0.20 0.00 0.40 Poultry manure 5%