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Agriscience 4.2 Vocabulary

Across
A substance in soil that resists changes of soil pH; examples are: organic matter, clay, carbonates, and phosphates.
The act or process of separating a solid from a liquid.
Permeability; The relative degree of downward movement of water in a soil.
A soil separate in the mechanical analysis of soil.
The extent of voids or openings in the soil that exists between soil particles and peds or clods. Pores hold water and air for absorption by plant roots.
The ability of a soil to hold water in the root zone.
Ideal soil texture for gardening; Soil that consists of less than 52% sand, 28-50% silt, and 7-27% clay.
Surface or subsurface soils which presumably are fertile soils, which in organic matter or humus debris.
A unit of soil structure such as an aggregate, crumb, prism, block, or granule formed by natural processes (not a clod).
The relative portions of sand, silt, and clay particles in a mass of soil.
Down
The first change with depth in texture or structure in a soil profile.
The ability of a soil to resist a change in its hydrogen-ion concentration.
Being supplied with air.
A thin mixture of water and any fine, insoluble material such as clay.
The capacity of soil or rocks to transmit fluid (or allow it to flow through). This depends on the size and shape of pores and interconnections.
A layer of soil parallel to the surface with distinct characteristics produced by soil-forming processes.
A vertical section of a soil; the face of an exposure is made by a cut, and may exhibit with depth a succession of separate layers though they may not be separated by sharp lines of demarcation.
A unit of soil structure that is formed artificially by compression of a wet clay soil (not a ped).