1. What is USDA Soil Texture Classification?

The USDA soil texture triangle classifies soils based on their percentages of sand, silt, and clay. It's a fundamental system used in soil science to determine a soil's physical properties and behavior.

2. How Does the Calculator Work?

The calculator uses the USDA soil texture triangle rules:

The calculator determines texture based on these percentages:

• Sand: 0.05-2.0 mm diameter particles
• Silt: 0.002-0.05 mm diameter particles
• Clay: <0.002 mm diameter particles

3. Importance of Soil Texture

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

4. Using the Calculator

Tips: Enter percentages of sand, silt, and clay that sum to exactly 100%. Values should be determined through laboratory particle size analysis.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculator?
A: It's accurate when proper particle size analysis is used. Field estimates may vary.

Q2: What's the best soil texture for plants?
A: Loam (40% sand, 40% silt, 20% clay) is generally ideal as it balances water retention and drainage.

Q3: Can I estimate texture without lab analysis?
A: The ribbon test can provide rough estimates, but lab analysis is more accurate.

Q4: Why does my sum not equal 100%?
A: Check your measurements. The calculator requires exact 100% sum for accuracy.

Q5: How does texture affect irrigation?
A: Sandy soils need frequent, light irrigation while clay soils need infrequent, deep watering.