Which soil type is described as the most erodible in the ranking presented?

Which soil type is described as the most erodible in the ranking presented?

• A. Silt
• B. Sand/Loam
• C. Clay
• D. Gravel

Answer: (A)

The main idea is that how easily soil erodes depends on particle size and how strongly the soil sticks together. Silt has very small particles that aren’t held together tightly, so water shear easily detaches the grains and carries them away. This makes silt the most erodible among common soil textures. Gravel resists erosion because its large, heavy particles are hard to move. Clay, while fine, tends to form strong cohesive aggregates, which helps it resist detachment unless the structure is severely disrupted. Sand and loam fall somewhere in between, with enough cohesion and structure to reduce detachment compared with silt. So, silt is the most erodible because its small, loosely bound particles are most easily detached and transported by moving water.

The main idea is that how easily soil erodes depends on particle size and how strongly the soil sticks together. Silt has very small particles that aren’t held together tightly, so water shear easily detaches the grains and carries them away. This makes silt the most erodible among common soil textures.

Gravel resists erosion because its large, heavy particles are hard to move. Clay, while fine, tends to form strong cohesive aggregates, which helps it resist detachment unless the structure is severely disrupted. Sand and loam fall somewhere in between, with enough cohesion and structure to reduce detachment compared with silt.

So, silt is the most erodible because its small, loosely bound particles are most easily detached and transported by moving water.