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- DEIANA, S.; GESSA, C.; MANUNZA, B.; RAUSA, R.; SEEBER, R.
- Soil science 1990 v.150 no.1 pp. 419-424
- animal manures; composts; sewage sludge; humic acids
- ... Humic acids extracted from sewage sludges, manure, and worm compost have been characterized by chemical and spec-troscopic methods. Meaningful differences in the composition were revealed by FT IR, H, C NMR, and visible spectroscopies. These differences allow a differentiation amomg the products depending on the source from which they were obtained. Humic acid extracted from sewage sludges contain ...