Relating to or containing nitrogen-rich organic compounds found in soil and humus, especially those formed by azo compounds.
From 'azo-' (containing nitrogen bonded to nitrogen, from German Azoimid) + 'humic' (from Latin humus, meaning soil or earth). The term emerged in soil chemistry to describe nitrogen-containing humic substances.
Soil scientists use this term to understand what makes healthy dirt—azohumic compounds are like nature's slow-release fertilizer, feeding plants over months as they break down in the earth.
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