Which factors are important in determining soil texture?

The determination of soil texture is fundamentally based on the relative proportions of sand, silt, and clay present in the soil. Soil texture influences many physical and chemical properties of the soil, including drainage, nutrient availability, and aeration, all of which are crucial for the growth of plants and the functioning of onsite wastewater systems.

Sand particles are larger, allowing for greater drainage but lower water and nutrient retention. Silt has smaller particle sizes and retains water better than sand but doesn't drain as quickly. Clay particles are the smallest, offering high nutrient retention and moisture retention, but they can become compacted and poorly drained. The specific combination of these three components determines how the soil behaves in various situations, such as during rain events or irrigation.

While factors like rock type, soil profile depth, and previous agricultural use can influence soil characteristics and health, they do not directly define soil texture. Understanding the balance of sand, silt, and clay is essential when evaluating soil for its suitability in onsite wastewater systems, as it impacts the design and functionality of septic systems, drainage fields, and more.