Texture class

Texture

Permeability rate

Permeability class

Coarse

Gravel, coarse sand Sand, loamy sand

> 20 inches/h 6.20 inches/h

Very rapid Rapid

Moderately coarse

Coarse sandy loam, sandy loam, fine sandy loam

2 - 6 inches/h

Moderately rapid

Medium

Very fine sandy loam, loam, silt loam, silt

0.60 - 2 inches/h

Moderate

Moderately fine

Clay loam, sandy clay loam, silty clay loam

0.20 - 0.60 inches/h

Moderately slow

Fine

Sandy clay, silty clay, clay (<60%)

0.06 - 0.20 inches/h

Slow

Very fine

Clay (>60%), clay pan

<0.06 inches/h

Very slow