Parts 1 - The Compleat Botanica

Compleat Botanica - Soil texture and the Bienz Soil Chart
Using the software Charts
The twelve principal soil textures used in The Compleat Botanica come from the Bienz Soil Chart published by the United States Department
of Agriculture.
sand particles more than 0.05 mm in diameter
silt particles between 0.002 mm and 0.05 mm in diameter
clay particles less than 0.002 mm in diameter
loam equal amounts of sand, silt, and clay particles along with humus, water, and air.