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Llana [10]
3 years ago
6

The "a" horizon or combined "o/a" horizons of the soil are known as the ________.

Geography
1 answer:
saveliy_v [14]3 years ago
5 0
<span>the layer of soil below the O horizon, composed of a mixture of of humus, sand, silt, and clay; combines the O horizon to form topsoil</span>
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