Cut fertiliser costs.
Keep the yield.
Use our Precision NPK Calculator to get exact N, P and K recommendations from your actual soil test — not regional averages.
Based on peer-reviewed agronomic methodology
You don't know if you're over- or under-applying.
Flat-rate recommendations ignore your actual soil. Most regional tables are years out of date.
Every wasted kg of nitrogen is money lost.
Up to 50% of applied nitrogen never reaches the crop. The rest leaches away — at your expense.
The previous crop matters. Most tools ignore it.
Preceding crop residues can offset significant nutrient needs — but only if someone accounts for them.
nazcagro works through the actual agronomic logic — crop demand, soil supply, preceding season, and field practices — and calculates each nutrient independently. Not a lookup table. Not a regional average. Your field.
Three inputs.
One precise result.
Soil parameters
Enter your soil type, texture, humus content, phosphorus, potassium, magnesium, calcium carbonate, and pH value. nazcagro uses your actual lab results — not regional averages — to anchor every calculation to your field.
Crop parameters
Select your crop and planned yield target. Add the preceding crop to account for residual nutrient contributions from the previous season — an important detail most tools ignore entirely.
Farming parameters
Specify manure application type and quantity, crop residue incorporation, and irrigation. Every field practice that affects nutrient availability is accounted for.
A precise result — not an average.
Most tools apply a flat nutrient rate per crop type. nazcagro works through the actual agronomic logic — crop demand, soil supply, previous season, and field practices — and calculates each nutrient independently.
Your crop's actual demand — nutrient needs calculated for your specific crop and yield target, not a generic average.
Credit for what's already there — the previous crop, crop residues, and any manure applied are factored in before a single kg is recommended.
Soil supply included — the lab results show what can be taken up from the soil. We only suggest what is really needed.
Irrigation taken into account — on well-watered fertile soils, nutrient availability improves. Our recommendation adjusts accordingly.
Less fertiliser.
Same harvest.
Compared to the regional flat-rate, nazcagro reduced the phosphorus recommendation by 11 kg/ha and the potassium recommendation by 35 kg/ha — crediting the preceding maize residue incorporation.
| Nutrient | Average | With nazcagro | Saved |
|---|---|---|---|
| N CAN (27% N) | 370 kg/ha | 370 kg/ha | — |
| P MAP (52% P₂O₅) | 396 kg/ha | 348 kg/ha | −48 kg/ha |
| K MOP (60% K₂O) | 317 kg/ha | 247 kg/ha | −70 kg/ha |
| Total cost | €429/ha | €377/ha | −€52/ha |
Indicative fertilizer prices used: CAN €270/t · MAP €550/t · MOP €350/t. Prices may vary by region and season.
Stop guessing.
Start calculating.
Create a free account and start running precise nutrient calculations based on your actual soil data.
Or write to us directly at info@nazcagro.com
Common questions
Is this free?
The calculator is free to use. Create an account to get started.
Where does the methodology come from?
The methodology is based on peer-reviewed precision agriculture research and standard agronomic balance methods widely used in European agronomy.
Do I need my soil test results?
You need: humus %, P₂O₅ (ppm), K₂O (ppm), Mg (ppm), CaCO₃ %, and pH. These are standard outputs from any accredited soil laboratory.
Does it work for my crop?
We support a growing list of field crops, including sunflower, maize, and common wheat. Open the calculator to see the full selection.
Can I save or share my results?
Results can be downloaded as a PDF from the calculator.
Is my data stored?
If you create an account, your email address and profile data are stored. See our Privacy Policy for details.