Soil texture refers to the percent of sand, silt and clay in the soil. Most soil descriptions follow the United States Department of Agriculture classification for determining soil texture classes. This is also referred to as the USDA soil textural triangle.In the USDA system, texture refers only to the particles that are less than 2 millimeters (less than 0.07 inch) in diameter. These may be referenced as the fine earth fraction in some soil reports. Organic material of all types is excluded from the textural determination. Sand-sized particles range from 0.05 to 2 millimeters in diameter; silt-sized particles range from
