1. What is the Soil Texture Triangle?

The Soil Texture Triangle is a diagram used to classify soil types based on their percentage of sand, silt, and clay particles. It helps determine the physical properties and behavior of different soils.

2. How Does the Calculator Work?

The calculator uses the USDA soil texture triangle with the fundamental equation:

Where:

• Sand particles range from 0.05-2.0 mm in diameter
• Silt particles range from 0.002-0.05 mm
• Clay particles are smaller than 0.002 mm

Explanation: The calculator plots your values on the texture triangle to determine the soil classification.

3. Importance of Soil Texture

Details: Soil texture affects water retention, drainage, nutrient availability, root penetration, and microbial activity. It's fundamental for agricultural planning and construction.

4. Using the Calculator

Tips: Enter percentages of sand, silt, and clay that must sum to exactly 100%. Values should come from laboratory particle size analysis.

5. Frequently Asked Questions (FAQ)

Q1: Why must the percentages sum to 100%?
A: The texture triangle is based on these three components making up the entire mineral fraction of soil.

Q2: How accurate is this classification?
A: Very accurate when using proper lab-measured values. Field estimates may vary by ±10-15%.

Q3: What about organic matter content?
A: Organic matter is not part of mineral texture classification. Highly organic soils require different classification systems.

Q4: Can I use this for construction purposes?
A: While helpful, engineering applications often require more detailed geotechnical analysis.

Q5: Where can I get my soil tested?
A: Most agricultural extension services and private soil labs offer particle size analysis.