| http://www.w3.org/ns/prov#value | - Reply Kristine says: August 7, 2013 at 7:08 pm Hi Elizabeth, I don???t have any research regarding humic acid and AFA, however I am aware that it is important (along with fulvic acid) for plant growth in soil/algae growth in water, and is delivered via organic fertilisers such as manures and peat.
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