Soil types are sand silt and clay. Loam is a combination of the three. Depending on the source is equal part of each or equal parts sand and silt with a smaller portion clay such as 40% - 40% - 20%. Depending on the mix, the term loam can be further describe by the content such as sandy loam, silty loam, clay loam, silty clay loam, sandy clay loam.
