Smart Fertilizer Calculator
Get personalized NPK recommendations in 5 simple steps
1
Fertilizer
2
Crop
3
Soil
4
Irrigation
5
Weed Pressure
6
Rainfall
Choose Your Fertilizer
First select the brand, then choose the specific product
Crop & Land Details
Tell us about what you're growing and the size of your land
Soil Analysis
Help us understand your soil conditions
ClayHeavy, retains water and nutrients well
SandyLight, drains quickly, low nutrient retention
LoamIdeal mix, good drainage and fertility
SiltSmooth texture, good fertility, moderate drainage
LegumesNitrogen-fixing crops (beans, peas, lentils)
Heavy FeedersHigh nutrient demanding crops (corn, tomatoes)
Light FeedersLow nutrient demanding crops (herbs, root vegetables)
None / First PlantingNo previous crop history
Water & Irrigation
Tell us about your irrigation system and water quality
Drip Irrigation90-95% efficiency
Sprinkler75-85% efficiency
Flood / Furrow50-70% efficiency
Rain-fedDependent on natural rainfall
ExcellentpH 6.5-7.5, very low salts
GoodpH 6.0-8.0, low salts
FairpH 5.5-8.5, moderate salts
PoorpH <5.5 or >8.5, high salts
Weed Pressure Assessment
Evaluate the level of weed competition in your field to fine-tune fertilizer efficiency and application strategy.
Low
Minimal weed competition
📈 No dose reduction needed
Medium
Moderate weed competition
⚠️ Consider weed control before fertilizing
High
Severe weed pressure, needs management
🚨 Weed management is critical before application
Why weed pressure matters
Weeds compete directly for nutrients. High weed pressure can reduce fertilizer uptake efficiency by up to 40%, wasting your investment and harming yield. This factor adjusts your final recommendation accordingly.
Seasonal Rainfall Level
Select your annual rainfall zone for accurate recommendations
— OR —
Very LowLess than 150 mm/year — arid conditions
Low150–300 mm/year — semi-arid
Moderate300–500 mm/year — typical dryland farming
High500–800 mm/year — good rainfed agriculture
Very HighOver 800 mm/year — risk of nutrient leaching
mm/year
If you know the exact annual rainfall, enter it here to refine the calculation.