USDA Soil Textural Triangle
USDA Soil Textural Triangle
(OP)
When using the textural triangle you can only plot clay, silt, and sand. What happens when you have say 10% gravel?? Am I to remove all gravel and redo the sieve analysis?? Any tips will be greatly appreciated.





RE: USDA Soil Textural Triangle
Just an opininated engineer. . .
f-d
¡papá gordo ain't no madre flaca!
RE: USDA Soil Textural Triangle
RE: USDA Soil Textural Triangle
RE: USDA Soil Textural Triangle
What the soil is wanted for will give significance to either or both reports
<<A good friend will bail you out of jail, but a true friend
will be sitting beside you saying " Damn that was fun!" - Unknown>>
RE: USDA Soil Textural Triangle
The point is that the gravel fraction (above say 10 percent)
is not treated as sand for the purpose of classifying the soil on the textural triangle,
or subsequent characterization of the permeability (infiltration rate)
or hydraulic storage capacity of the soil.
RE: USDA Soil Textural Triangle
For example you have 10% gravel, 45% sand, 25% silt and 20% clay..........it plots on the soil triangle as just that.....45% sand, 25% silt and 20% clay.........if the 10% gravel makes it impossible to plot then I would maybe convert the gravel into sand......but I think if you are using the soil triangle correctly it takes in account gravel sizes and the fact that 100% of the sample is not always sand, silt and clay.
RE: USDA Soil Textural Triangle