noun
A2-horizon - a layer of soil characterized by its specific depth, color, texture, and composition in the soil profile
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The geologists studied the a2-horizon to analyze the soil composition.
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We gotta dig into that a2-horizon to see what's going on.
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Let's check out the dirt in the a2-horizon, see if there's anything interesting.
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Exploring the a2-horizon of our project revealed hidden complexities.