Formula Used
The calculator first converts every area into square metres. It converts rates into kilograms per square metre. This keeps mixed-unit calculations consistent and easier to verify.
How to Use
- Choose the calculation mode matching your planning task.
- Enter the field area using direct or shaped dimensions.
- Enter nutrient rates from your soil-test recommendation.
- Add fertilizer products with accurate N-P-K analyses.
- Set efficiency, losses, applications, and preferred output units.
- Calculate, review warnings, then export the verified results.
Example Data
| Input | Example | Purpose |
|---|---|---|
| Area | 1,000 m² | Defines total treated land. |
| N-P-K rates | 80-40-60 kg/ha | Sets nutrient targets. |
| Primary product | 10-10-10 | Supplies the selected nutrient. |
| Efficiency | 90% | Adjusts for effective delivery. |
| Material loss | 5% | Allows handling or placement loss. |
| Applications | 2 | Splits total product evenly. |
Frequently Asked Questions
What do fertilizer N-P-K numbers mean?
They show nitrogen, phosphate, and potash percentages by weight.
Should I use soil-test recommendations?
Yes. A current soil test provides safer target nutrient rates.
Why does efficiency increase fertilizer quantity?
Lower efficiency means less applied nutrient reaches the intended zone.
Can this calculator blend several products?
Yes. It estimates non-negative quantities matching three nutrient targets.
Why can blend results show a shortfall?
Available product analyses may not exactly match the requested ratio.
Can I compare product costs?
Yes. Comparison mode calculates containers and cost per nutrient kilogram.
How are liquid ppm calculations handled?
The calculator uses tank volume, nutrient percentage, and product density.
What is the difference between exact and purchase cost?
Exact cost allows fractions. Purchase cost rounds containers upward.
Can I plan multiple fields?
Yes. Add direct areas beneath the primary field section.
Does this replace professional advice?
No. Always follow qualified recommendations and every product label.