ISHS Acta Horticulturae 172: Composts as Horticultural Substrates
DOPPLERITE - A NATURAL OCCURRING HUMIC ACID |
| Author: | G.C.S. Wilson |
| Abstract:
Dopplerite, a naturally occurring humic acid, is described and details of a recent find in Scotland are given. Analysis shows it to contain 51.97% carbon, 4.74% hydrogen, 0.66% nitrogen and 42.63% oxygen, on an ash free basis. It had 7.5% ash, composed mainly of calcium and iron. A discussion is given on the physiological role of humic substances in plant metabolism. | |
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