Organic soil mixture of crumbly clay, silt, and sand.
Merriam-Webster Online Dictionary
loam (noun)1.
a) a mixture (as for plastering) composed chiefly of moistened clay
b) a coarse molding sand used in founding
2.
- soil , specifically a soil consisting of a friable mixture of varying proportions of clay, silt, and sand
fertile soil, rich earth, topsoil, humus-rich soil, garden soil
