The **Soil Texture Pyramid** shows the ratio of particles within the soil.

**Loam** (40% sand, 40% silt, 20% clay) is considered the best soil type for growing crops. It is said to be the most arable.

Any soil type that contains loam is considered arable.

**Example:** You have a soil that consists of 30% clay, 40% sand, and 30% silt.

**Steps:**

- Find the number 30 along the clay (left) side.
- Find the number 40 along the silt (right) side.
- Find the number 30 along the sand (bottom) side.
- Where all three lines intersect gives you the soil classification.

Your Soil is CLAY LOAM.

Note: Notice that all three numbers add up to 100%.

**Give it a try!**

What type of soil is 20% clay, 40% silt, and 40% sand?

Loam

Source: USDA Soil Survey Manual