AFNR Lesson 4.2 Vocabulary

The process of being supplied with air.

• Aeration

• Filtration

• Internal drainage

• Porosity

The act or process of separating a solid from a liquid.

• Aeration

• Filtration

• Internal Drainage

• Porosity

The relative degree of downward movement of water in a soil. Also called permeability.

• Aeration

• Internal Drainage

• Filtration

• Porosity

Refers to the extent of voids or openings in the soil that exist between soil particles and soil peds or clods.

• Aeration

• Filtration

• Internal Drainage

• Porosity

Unweathered hard rock that lies directly beneath the soil layers.

• Bedrock

• Loam

• Parent Material

• Slurry

Soil that consists of less than 52 percent sand, 28 to 50 percent silt, and 7 to 27 percent clay, resulting in a soil texture ideal for gardening.

• Bedrock

• Loam

• Parent Material

• Slurry

The horizon of weathered rock from which sediments were derived to form later rocks.

• Bedrock

• Loam

• Parent Material

• Slurry

A thin mixture of water and any fine insoluble materials such as clay.

• Bedrock

• Loam

• Parent Material

• Slurry

A layer of soil, approximately parallel to the surface, having distinct characteristics produced by soilforming processes.

• Horizon

• Soil

• Soil Particle

• Soil Profile

The mineral and organic surface of the earth capable of supporting upland plants.

• Horizon

• Soil

• Soil Particle

• Soil Profile