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Direct linkJones, Nastassia N. – ProQuest LLC, 2011
Humic substances (HS) are the humified portions of totally decomposed soil organic matter that are ubiquitous in nature. Although these substances have been studied for more than 200 years, neither their metabolic capabilities nor a specific chemical structure has yet to be determined. HS have been studied as a carbon source in many environments…
Descriptors: Elementary Secondary Education, Donors, Familiarity, Genetics
