1. What is the Soil Pyramid?

The Soil Texture Pyramid (or Soil Texture Triangle) is a classification system that determines soil type based on the percentage of sand, silt, and clay particles. It's a fundamental tool in soil science and agriculture.

2. How Does the Calculator Work?

The calculator uses the USDA soil texture classification system:

Where:

• \( Sand \) — Particles 0.05-2.0 mm in diameter
• \( Silt \) — Particles 0.002-0.05 mm in diameter
• \( Clay \) — Particles less than 0.002 mm in diameter

Explanation: The calculator plots your percentages on the soil pyramid to determine the texture class.

3. Importance of Soil Texture

Details: Soil texture affects water retention, nutrient availability, root penetration, and microbial activity. It's crucial for crop selection and irrigation planning.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: How do I determine sand, silt, and clay percentages?
A: The most accurate method is laboratory particle size analysis (hydrometer or pipette method).

Q2: What's the difference between soil texture and soil structure?
A: Texture refers to particle size distribution, while structure refers to how particles aggregate into peds.

Q3: Why does my soil texture matter for gardening?
A: Sandy soils drain quickly but hold few nutrients, while clay soils retain water but may restrict root growth.

Q4: Can I estimate texture by feel?
A: Yes, the "ribbon test" can provide a rough estimate, but lab analysis is more accurate.

Q5: What's the ideal soil texture for most plants?
A: Loam (approximately 40% sand, 40% silt, 20% clay) is generally ideal for most plants.