The distribution of which particles determines soil texture?

The distribution of which particles determines soil texture?

• A. Sand, silt, clay
• B. Pebbles, gravel, cobbles
• C. Organic matter, minerals, water
• D. Air, water, minerals

Answer: (A)

Soil texture is defined by the relative amounts of mineral particles by size, specifically the sand, silt, and clay fractions. This distribution of particle sizes is what the texture classification is built on, and it directly influences how a soil feels and behaves—drainage, aeration, and how much water and nutrients it can hold. Coarse fragments like pebbles, gravel, and cobbles aren’t part of the texture classification; they’re coarse fragments and affect overall soil hardness and drainage, but texture focuses on the fine-earth fraction. Organic matter, minerals, and water describe soil components and water relations, but texture specifically depends on the size distribution of the mineral particles. In practice, soils rich in sand drain quickly and feel gritty, while those with more clay drain slowly and feel sticky; most garden soils are loams with a balance of sizes for good structure.

Soil texture is defined by the relative amounts of mineral particles by size, specifically the sand, silt, and clay fractions. This distribution of particle sizes is what the texture classification is built on, and it directly influences how a soil feels and behaves—drainage, aeration, and how much water and nutrients it can hold. Coarse fragments like pebbles, gravel, and cobbles aren’t part of the texture classification; they’re coarse fragments and affect overall soil hardness and drainage, but texture focuses on the fine-earth fraction. Organic matter, minerals, and water describe soil components and water relations, but texture specifically depends on the size distribution of the mineral particles. In practice, soils rich in sand drain quickly and feel gritty, while those with more clay drain slowly and feel sticky; most garden soils are loams with a balance of sizes for good structure.