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Home → Publications → 1982 Southern Nursery Conferences → Decomposition and Effect on pH of Various Organic Soil Amendments

Decomposition and Effect on pH of Various Organic Soil Amendments

Decomposition and effect on soil properties and seedling growth of peat, sewage sludge, shredded cones, and 20-year-old slash pine sawdust were tested in field plots installed in a forest nursery in north Florida. After 18 months, the loss rates of organic material at, respectively, the 22.4, 44. 8, and 89.6 mt/ha additions were as follows: 62, 51, 51% for peat; 51, 54, 44% for sludge; 51, 68, 68% for cones; 73, 53, 50% for sawdust. Peat lowered soil reaction by 0.3 pH unit for each 1% increase in organic matter. Cones and sawdust lowered pH slightly after 12 months. Sludge increased pH from 5.7 to 6.5 initially, then reduced it to 4.8 after 3 months.


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Author(s): Kenneth R. Munson

Publication: 1982 Southern Nursery Conferences

Event: Southern Nursery Conferences - Western Session
1982 - Oklahoma City, OK

Section: Soils, Organic Matter, and Mycorrhizae