Soil Texture Triangle Quiz

Match the type of soil particle to its percentage in the soil represented by Point A.

• 25%

• silt

• 10%

• clay

• 65%

• sand

Match the type of soil particle to its percentage in the soil represented by Point B.

• 20%

• sand

• 70%

• silt

• 10%

• clay

Soil composed of 24% clay, 37% silt, and 39% sand falls into which textural class?

• Loam

• Clay loam

• Silt loam

• Sand

Soil composed of 75% sand, 10% silt, and 15% clay falls into which textural class?

• Sandy loam

• Sandy clay loam

• Loam

• Sand

Soil composed of 15% sand, 35% silt, and 50% clay falls into which textural class?

• Clay

• Silty clay loam

• Clay loam

• Sandy clay

The soil triangle is used to determine the soil texture and percentages of sand, silt and clay.

• True

• False

What is the soil texture of a 50% sand, 40% clay, 10% silt soil?

What is the soil texture of a 30% sand, 50% clay, 20% silt soil?

The mineral portion of a soil is composed of 23% clay and 55% sand. What is the % that consists of silt?

Using the soil triangle below state what type of soil has 33% clay, 43% silt and 24% sand.

(do not assume the arrows drawn in red, yellow and blue relate to this soil).

• clay

• sandy loam

• clay loam

• silty clay