title: Sulfate reduction in poorly-drained soils as influenced by organic matter and soil texture.
abstract: Investigations of the influence of added organic matter content (rice straw or clover) on the reduction of added sulfate (8 meq/100 g soil) following submergence and incubation of 120 days gave these results: 1. In soils with native organic matter (humus) the rate of sulfate reduction was very low; it slightly increased with increased clay content of the soils. 2. The addition of undecomposed organic matter led to a complete reduction of the added sulfates within 120 days. 3. The varying C/N ratio of the added organic matter appeared to have no influence on the sulfate reduction. 4. As a qualitative indication of the reduction the soil darkened after three weeks of incubation, and an odour of H2S was detected.
mesh_terms: D010084:Oxidation-Reduction; D010316:Particle Size; D012987:Soil / Q000032:analysis; D012988:Soil Microbiology; D013431:Sulfates; D013455:Sulfur
chemical_list: D012987:Soil; D013431:Sulfates; D013455:Sulfur