Textural triangle - USA & Canadian

SIMPLE FIELD SOIL IDENTIFICATION TESTS

Using the Textual triangles

PREPARATION OF SAMPLES
As before.

There are two accepted triangles, the Canadian and the USA shown below. Both use the % of soil types.

Canadian

Click on the image above for correct percentage and density figures for your result.

Soil classification is typically made based on the relative proportions of silt, sand and clay. Follow any two component percentages to find the nominal name for the soil type. For example, 30% sand, 30% clay and 40% silt:

Find 30% along the bottom (sand) line, and follow the slanted line up and to the left. Stop at the horizontal line for 30% clay, and find the soil type: clay loam.

Click on the image above for correct percentage and density figures for your result.

Soil classification can also be derived in the same way in the chart above

Legend....... H= heavy C= clay S=sand Si= silt L= loam

This information was put together by Brian Jackson of World Enzymes Australia.

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