Which method of classifying soil focuses on its mineral composition?

The method that focuses on the mineral composition of soil is particle size classification. This approach assesses the size of individual soil particles, which include sand, silt, and clay. Understanding the mineral composition is crucial because different minerals have distinctive physical and chemical properties that influence soil behavior, fertility, drainage, and overall health.

Particle size classification is fundamental in determining how soil interacts with water and nutrients, which directly affects agricultural practices and land management. For instance, sandy soils drain quickly but may not retain nutrients well, while clay soils can hold more nutrients but may have poor drainage. Accurate classification helps farmers and land managers make informed decisions regarding crop selection, irrigation, and soil amendment practices.

In contrast, texture assessment combines both particle size and the arrangement (or structure) of particles to convey how soil feels and functions, while organic matter analysis examines the content of decomposed plant and animal material, and hydrological evaluation pertains to how soil interacts with water. These methods provide essential insights but do not specifically focus on mineral composition like particle size classification does.