Surface soil
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- Upper part of the soil ordinarily moved in tillage, or its equivalent in uncultivated soils, about 10 to 20 cm in thickness.
Bureau of Reclamation - Cite This Source - This Definition - Arable, Backfurrow, Binder (soil binder), Borderline soils, Consistency, Fossorial insects, Heap, Permafrost, Pile, Plastic soil, Plasticity, Soil-cement bedding, Soil moisture, Unified Soil Classification System