Advanced Garden Soil Air Content Calculator

Formula Used

The air content in soil (often referred to as air-filled porosity) is calculated using fundamental soil physics formulas involving bulk density, particle density, total porosity, and volumetric water content:

• Bulk Density ($Db$): $$Db = \frac{Mass\ of\ Dry\ Soil}{Total\ Soil\ Volume}$$
• Total Porosity ($P$): $$P = \left(1 - \frac{Db}{Particle\ Density}\right) \times 100$$
• Volumetric Water Content ($\theta$): $$\theta = \left(\frac{Mass\ of\ Water}{Total\ Soil\ Volume}\right) \times 100$$
• Air Content ($A$): $$A = P - \theta$$

How to Use This Calculator

1. Collect a known volume core sample of your garden soil (e.g., $1000\ cm^3$).
2. Weigh the sample immediately to get the wet soil weight in grams.
3. Dry the sample completely in an oven and record the dry soil weight.
4. Input these core metrics alongside organic matter percentage into the respective tool fields.
5. Click the calculate button to instantly review your detailed soil aeration metrics.