GENERAL GEOLOGY

Detailed explanation-1: -The 3 profile types are: uniform-same texture throughout the soil profile. texture-contrast-abrupt texture change between the topsoil and subsoil. gradational-texture gradually increases down the soil profile.

Detailed explanation-2: -If you squeeze it between your thumb and fingers, it will not form ribbons. Clay feels sticky when wet. It easily forms into a ball and a ribbon at least 5 cm long. Water drains very slowly through clay soil.

Detailed explanation-3: -There are four types of clay soil that differ in characteristics depending on the amount of clay in the soil. The different percentages of clay soil include silt soils which have 0 to 10 percent clay, clay soils with 10 to 25 percent clay, clay soils with 25 to 40 percent clay and clay soils with 40 percent clay.

Detailed explanation-4: -Soil can be classified into three primary types based on its texture – sand, silt and clay. However, the percentage of these can vary, resulting in more compound types of soil such as loamy sand, sandy clay, silty clay, etc. 2. State the characteristics of sandy soil.