Alteration of organic matter during remediation of acid sulfate soils

Best remediation success was achieved by adding 50% of the native soil OC as wheat straw, resulting in fast pH neutralization, strongly reducing conditions, and decreased sulfur and iron concentrations in the soil solution. However, the amount of bioavailable OC was reduced to one third after the incubation period. Repeated OC addition is therefore recommended to keep the total amount of bioavailable, undecomposed plant residues high and to ensure long-term remediation success.