Grain Size Analysis of Soil Calculator
Grain size analysis of soil is a crucial process in understanding the physical properties and behavior of soil. It helps in determining soil texture, permeability, and erodibility, which are essential for various applications such as agriculture, construction, and environmental management.
How to Use This Calculator
- Enter the percentage of coarse, medium, and fine fractions in the respective input fields.
- Click the “Calculate” button.
- View the results below the calculator.
Formula & Methodology
The grain size analysis of soil is typically performed using a combination of sieving and hydrometer analysis. The results are expressed as the percentage of soil particles in different size ranges. The formula used in this calculator is based on the USDA texture triangle:
Clay = Fine fraction
Silt = Medium fraction – (Clay * 0.15)
Sand = Coarse fraction – (Clay * 0.35)
Real-World Examples
Data & Statistics
| Texture Class | Clay (%) | Silt (%) | Sand (%) |
|---|---|---|---|
| Clay | 40+ | 40- | 40- |
| Silty Clay | 30-40 | 40-60 | 20- |
Expert Tips
- Always ensure that the total percentage of coarse, medium, and fine fractions adds up to 100%.
- For accurate results, use a well-calibrated balance and high-quality sieves.
- Consider the limitations of the USDA texture triangle, such as its inability to account for organic matter and swelling clays.
Interactive FAQ
What is the difference between coarse, medium, and fine fractions?
Coarse fractions are particles larger than 2 mm, medium fractions are particles between 0.05 and 2 mm, and fine fractions are particles smaller than 0.05 mm.
For more information, see the following authoritative sources: