What are the five classifications of soil?

The correct classification of soil includes five main types: sand, gravel, silt, clay, and clay-loam.

Sand is characterized by its larger particle size, which allows for good drainage but holds less moisture and nutrients. Gravel, being even larger than sand, also provides excellent drainage but is less commonly discussed as a separate soil type in agricultural contexts. Silt has medium-sized particles that retain moisture and nutrients better than sand, making it important for crop growth. Clay consists of very fine particles that compact tightly, leading to poor drainage but a high nutrient retention capability. Clay-loam is a mixture that balances the properties of sand, silt, and clay, combining the advantages of good drainage with nutrient retention.

This classification is fundamental in understanding soil behavior and its implications for agriculture, construction, and environmental management. Understanding these soil types allows for better agricultural planning, soil conservation, and land use practices.