Soil and Beds
Soil Organic Matter Addition Calculator
For a defined garden case, Soil Organic Matter Addition uses dry soil mass and target organic matter increase to find dry organic matter.
Enter values for dry organic matter
Dry soil mass and the other Soil Organic Matter Addition fields share one scenario.
Soil Organic Matter Addition in practical terms
The planning question for Soil Organic Matter Addition is whether you can estimate dry organic matter needed for a target mass-fraction increase. Soil Organic Matter Addition measures this portion as Dry organic matter. Area-weighted pH is available from Weighted Soil pH Calculator.
Record adjustments outside Dry organic matter separately.
Arithmetic used for Soil Organic Matter Addition
Soil Organic Matter Addition multiplies factors from Dry soil mass and Target organic matter increase to produce dry organic matter. Use the Sulfur Application Amount tool when sulfur needed needs its own calculation.
Soil Organic Matter Addition evaluates dry soil mass at 2,200 lb and target organic matter increase at 0.01 as 22.00 lb.
Using the Soil Organic Matter Addition result
Use Dry organic matter to estimate dry organic matter needed for a target mass-fraction increase. Keep the Soil Organic Matter Addition inputs beside the output. The related Lime Application Amount Calculator finds lime product needed.
Before entering dry soil mass
Prepare Dry soil mass and Target organic matter increase for Soil Organic Matter Addition. Keep unrelated records separate.
- Dry soil mass. Default in Soil Organic Matter Addition: 2,200 lb.
- Target organic matter increase. The Soil Organic Matter Addition target is 0.01 in the starting case.
Comparing Soil Organic Matter Addition scenarios
To compare alternatives, save the current result before changing Target organic matter increase. Label both cases so the source measurements remain clear. Soil carbon stock also belongs in Soil Carbon Stock Calculator.
Soil Organic Matter Addition assumption to check
Decomposition means long-term soil organic matter gain will be smaller.
Before relying on dry organic matter
Can one sample support Soil Organic Matter Addition?
Not always. Dry organic matter may vary with depth and location, so several readings or a composite sample can be more representative.
How does “Decomposition means long-term soil organic matter gain will be smaller.” affect dry organic matter?
The formula cannot infer that condition from the other entries. Verify dry soil mass before treating the result as a field target.