Soil Factors and Classification

A set of vocabulary flashcards covering soil factors including texture ribbon length, depth limits, past erosion percentages, and slope gradient classifications.

Medium Soil Texture

Surface soil texture category characterized by a ribbon length of $< 1''$.

Moderately Fine Soil Texture

Surface soil texture category characterized by a ribbon length of $1-2''$.

Fine Soil Texture

Surface soil texture category characterized by a ribbon length of $> 2''$.

Deep Soil

Soil depth classification measuring $> 40''$ to a limiting layer.

Moderately Deep Soil

Soil depth classification measuring $20-40''$ to a limiting layer.

Shallow Soil

Soil depth classification measuring $10-20''$ to a limiting layer.

Very Shallow Soil

Soil depth classification measuring $< 10''$ to a limiting layer.

Deposition (Past Erosion)

Past erosion state where there is more current topsoil present than original topsoil.

None to Slight Erosion

Past erosion level resulting in less than $25\text{ }\text{\%}$ ($< 25\text{ }\text{\%}$) loss of topsoil.

Moderate Erosion

Past erosion level resulting in $25\text{ }\text{\%}-75\text{ }\text{\%}$ loss of topsoil.

Severe Erosion

Past erosion level resulting in more than $75\text{ }\text{\%}$ ($> 75\text{ }\text{\%}$) loss of topsoil.

Depression Slope

Slope designation defined visually as a bowl shape.

Nearly Level Slope

Slope category with a gradient of $0-3\text{ }\text{\%}$.

Gently Sloping

Slope category with a gradient of $3-6\text{ }\text{\%}$.

Moderately Sloping

Slope category with a gradient of $6-9\text{ }\text{\%}$.

Strongly Sloping

Slope category with a gradient of $9-15\text{ }\text{\%}$.

Steep Slope

Slope category with a gradient of $15-25\text{ }\text{\%}$.

Very Steep Slope

Slope category with a gradient of $> 25\text{ }\text{\%}$.