(Usually capitalized) Soil that has a well-differentiated profile, with the three types or horizons of soil.
In ABC soil, the uppermost, darkest zone that is rich in organic matter. The upper section of the A horizon usually contains humus along with plant and animal matter in varying stages of decay. The middle section usually contains a high concentration of quartz or other minerals that remain following the leaching away of clay, iron, and aluminum. The lower section is typically transitional in nature between the A horizon and the B horizon.
Find another word for a-horizon. In this page you can discover 2 synonyms, antonyms, idiomatic expressions, and related words for a-horizon, like: abc-soil and a-horizon.