1. Soil Science

Soil Classification — Quiz

Test your understanding of soil classification with 5 practice questions.

Practice Questions

Question 1

Which of the following soil orders is characterized by a high content of amorphous materials, such as volcanic ash, and is known for its high fertility?

Question 2

In the context of soil classification for engineering applications, what is the primary significance of the 'coefficient of uniformity' ($C_u$) and 'coefficient of curvature' ($C_c$)?

Question 3

A soil profile exhibits a 'mollic epipedon' and an 'argillic horizon'. Which of the following soil orders is most likely represented by this description?

Question 4

When performing a soil survey for agricultural land use planning, identifying a 'fragipan' in the soil profile would primarily indicate:

Question 5

Consider a soil with a liquid limit (LL) of $45\%$ and a plastic limit (PL) of $20\%$. According to the Unified Soil Classification System (USCS) plasticity chart, this soil would be classified as: