How to Choose the Right Fertilizer for Your Crops
A comprehensive guide to selecting the appropriate fertilizers based on soil type, crop requirements, and growth stage.
Understanding fertilizer selection is key to maximizing your crop yields while minimizing costs. Here's everything you need to know.
## Understanding NPK Numbers The numbers on fertilizer bags (e.g., 17:17:17) indicate: - First number: Nitrogen (N) - for leaf growth - Second number: Phosphorus (P) - for root development - Third number: Potassium (K) - for overall plant health
Fertilizers for Different Growth Stages
### At Planting (Basal Application) DAP (18:46:0) - High phosphorus for root establishment - Apply 50kg per acre in planting furrow
NPK 23:23:0 - Balanced N and P - Good for poor soils
### Top Dressing CAN (26:0:0) - Pure nitrogen for vegetative growth - Apply 4-6 weeks after planting
Urea (46:0:0) - Highest nitrogen content - More economical but volatile
## Soil Testing is Key Before applying any fertilizer: - Get your soil tested at KALRO or private labs - Results will show nutrient deficiencies - Customize fertilizer application accordingly
## Application Methods - Band application: More efficient - Broadcasting: For large areas - Foliar feeding: Quick nutrient uptake
## Common Mistakes to Avoid - Applying fertilizer on dry soil - Over-application (can burn crops) - Using wrong fertilizer type - Poor timing of application
Peter Ochieng
Soil Scientist
Contributing writer at Agrovert Farm Solutions, helping farmers succeed with expert insights and practical advice.
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