Organic Matter Increase (Rough) Calculator
Get a rough estimate of compost required to raise soil organic matter (OM) within a chosen mixing depth. This heuristic is a starting point—verify with soil tests and local recommendations.
Results
Results include: Estimated Compost depth (in), Cubic yards, and approximate Tons.
Useful Tips
- Heuristic only: Treat the estimate as a starting point and verify with soil tests.
- Depth matters: Increasing mixing depth dilutes OM and needs more compost for the same % gain.
- Compost OM varies: Use supplier specs if available; adjust the calculator inputs.
- Incorporation: Mix compost evenly to the chosen depth for consistent results.
- Maintenance: Maintain OM with periodic mulch/compost additions rather than one large dose.
- Drainage & structure: OM helps aggregation but won’t fix drainage issues alone.