Guide for Placing Soils in Capability Units

Capability Unit

Principal Soil Property or Limitation

1

Potential or actual wind or water erosion hazard.

2

Drainage or overflow hazard. (swp or poorly drained, flooded or ponded)

3

Slowly or very slowly permeable subsoils or substrata.

4

Coarse or gravelly textures.

5

Fine or very fine textures.

6

Salinity or alkali, sufficient to constitute a continuing limitation or hazard.

7

Stones, cobbles, or rocks sufficient to interfere with tillage.

8

Hardpan or hard unweathered bedrock within the root zone.

9

Low inherent fertility, associated with strong acidity, low calcium-

10

High organic matter content - peats and mucks.

11

Coarse sandy or very gravelly substrata limiting to root penetration and moisture retention.