Loam composition is approximately what?

• A. 20% sand, 60% silt, 20% clay
• B. 40% sand, 40% silt, 20% clay
• C. Approximately 40% sand, 40% silt, and 20% clay
• D. 60% sand, 20% silt, 20% clay

Answer: (C)

Loam is a soil texture that balances sand, silt, and clay to give good structure, drainage, and nutrient-holding capacity. A common rule of thumb is about 40% sand, 40% silt, and 20% clay. Saying approximately reflects that real soils vary a bit by location and measurement, but this balance is what scientists and educators use to describe the typical loamy texture. This near-equal mix of sand and silt, with a smaller amount of clay, creates well-connected pore spaces for drainage and aeration while still retaining enough water and nutrients for plants. The option that states approximately 40% sand, 40% silt, and 20% clay best captures this practical, real-world range.