US Department of Agriculture textural classes
usdaTexture A list of two data frames: polygons contains 53 rows and 4 columns and labels contains 12 rows and 5 columns.
- clay
Percentage of clay content
- sand
Percentage of sand content
- silt
Percentage of silt content
- label
Texture class
- angle
Angle to rotate the label in the texture triangle
Source
Adapted from data(USDA, package = "ggtern").
