Below are practical fertilizer recommendations tailored for different vegetable crops. We optimize each plan for different growth stages to maximize both yield and quality.
1. Tomato
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Soil Preparation (Pre-planting):
- For organic fertilizer, use 8-10 meters of compost or decomposed manure.
- Phosphorus fertilizer: 60 kg of superphosphate.
- Agricultural sulfur: 20 kg is needed to adjust the pH of the soil.
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Vegetative Growth (0–45 days):
- Ammonium nitrate: 16 kg divided into weekly doses.
- The foliar spray contains 0.6 g/L of a micronutrient mix that includes iron, zinc, and manganese.
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Flowering and Fruiting (after 45 days):
- Add 20 kg of potassium sulfate to improve the quality of the fruit.
- To prevent blossom end rot, apply 10 kg of calcium nitrate.
2. Cucumber
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Soil Preparation:
- Organic fertilizer: 8 m³ of compost.
- Phosphorus fertilizer: 60 kg of superphosphate.
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Growth and Fruiting:
- For fruit firmness, apply 10 kg of calcium nitrate every 10 days.
- To boost yield, apply 15 kg of potassium sulfate every two weeks.
- Foliar spray: Apply 1 g/L of iron and zinc for improved leaf health.
3. Onion
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Soil Preparation:
- The organic fertilizer consists of 8-10 meters of decomposed manure.
- Phosphorus fertilizer: 80 kg of superphosphate.
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Vegetative Growth (0–60 days):
- Ammonium nitrate: 15 kg is divided into weekly applications.
- Foliar spray: Apply a micronutrient mix every 10 days.
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Bulb Formation (60–90 days):
- To increase the size of the bulb, add 20 kg of potassium sulfate.
- Use 10 kg of calcium nitrate to improve the quality of your skin.
4. Zucchini
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Soil Preparation:
- Organic fertilizer: 6–8 m³ of compost.
- Agricultural sulfur: 10 kg is needed for soil adjustment.
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Growth and Fruiting:
- Ammonium nitrate: 12 kg split weekly.
- For fruit quality, apply 15 kg of potassium sulfate every two weeks.
- Seaweed spray: Enhances flowering and stress resistance.
5. Sweet Pepper (Bell Pepper)
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Soil Preparation:
- Organic fertilizer: 8 m³.
- Phosphorus fertilizer: 50 kg of superphosphate.
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Vegetative Growth (0–30 days):
- Ammonium nitrate: 10 kg biweekly.
- Foliar spray: 0.8 g/L micronutrient mix.
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Fruiting:
- To improve fruit quality, add 10 kg of calcium nitrate weekly.
- Potassium sulfate: 20 kilos every 15 days.
6. Eggplant
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Soil Preparation:
- Organic fertilizer: 8–10 m³.
- Phosphorus fertilizer: 50 kg.
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Vegetative Growth:
- Ammonium nitrate: 12 kg weekly.
- The foliar spray contains iron, zinc, and manganese to promote vigorous leaves.
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Fruiting:
- Potassium sulfate: 25 kg every two weeks.
- Calcium-boron spray: Enhances fruit set and quality.
7. Carrot
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Soil Preparation:
- Organic fertilizer: 8 m³.
- Phosphorus fertilizer: 50 kg of superphosphate.
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Growth Stage:
- Ammonium nitrate: 10 kg weekly for root growth.
- To improve size and sweetness, administer 20 kg of potassium sulfate every two weeks.
8. Lettuce
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Soil Preparation:
- Organic fertilizer: 6 m³.
- Agricultural sulfur: 8 kg is needed for pH adjustment.
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Growth Stage:
- Ammonium nitrate: 8 kg biweekly.
- To prevent tip burn, use 10 kg of calcium nitrate weekly.
9. Cabbage
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Soil Preparation:
- Organic fertilizer: 10 m³.
- Phosphorus fertilizer: 80 kg of superphosphate.
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Growth Stage:
- For strong leaf development, apply 15 kg of ammonium nitrate biweekly.
- To enhance head quality, administer 25 kg of potassium sulfate every two weeks.
10. Spinach
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Soil Preparation:
- Organic fertilizer: 5 m³.
- Agricultural sulfur: 5 kg.
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Growth Stage:
- Ammonium nitrate: 6 kg weekly.
- The micronutrient spray contains 0.5 g/L iron and manganese to promote vibrant green leaves.
General notes for all crops
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Irrigation:
- Use drip irrigation for efficient nutrient delivery.
- Reduce water during final stages for better fruit or bulb quality.
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Soil Testing:
- Perform regular soil analysis to adjust fertilizer doses accurately.
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Stress Management:
- Apply seaweed extract or humic acid sprays to enhance resilience under heat or water stress.
Let me know if you need further guidance or adjustments for specific conditions!