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humic compounds GEOL

humic compounds

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The soils, which are often thin, are generally acidic, well drained with a gritty, loamy texture and a humic surface horizon. en.wikipedia.org

In any case, the lagoon indeed grows slowly, owing to rainwater, acidic from the soil's humic acids, dissolving the lagoon's carbonate rock bottom. en.wikipedia.org

In earlier times one dug a large hole in the vegetable garden, which then was partially filled up with humic mulch. en.wikipedia.org

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