Macadamia Nutrient Replacement Calculator
Estimate annual nutrient replacement targets from yield, then compare a fertiliser plan against those targets. Default nutrient export coefficients are based on kg nutrient removed per tonne of nut-in-shell (NIS).
1. Yield, strategy and coefficients
Primary yield basis used for nutrient export calculations.
Used when rating whether the plan is close to target.
Default export coefficients (kg nutrient removed per tonne NIS)
Maintenance factors
Build-up overlay (extra elemental kg/ha/year)
Enter the total build-up amount below. The calculator converts it to an annual addition.
Optional soil constraints
2. Product plan
Choose products, enter analyses and rates, then compare achieved elemental nutrient supply against target nutrient replacement.
How product contribution is calculated
- Contribution of each nutrient = product rate × nutrient analysis % ÷ 100.
- Example: 200 kg/ha SOP at 41.5% K and 17% S supplies 83 kg K/ha and 34 kg S/ha.
- This version compares a proposed plan to target replacement. It does not automatically optimise product rates.
3. Results summary
Yield basis
4.0 t/ha
Strategy
Maintenance
Products in plan
0
| Nutrient | Removal (kg/ha) |
Maintenance target (kg/ha) |
Build-up add-on (kg/ha/year) |
Final target (kg/ha) |
Achieved by plan (kg/ha) |
Difference (kg/ha) |
Status |
|---|
Interpretation notes