Onion High Yield Guide

NO.1: Critical Challenges in Onion Farming

1. Soil and Nutrient Requirements

Onions demand specific growing conditions:

• Ideal pH range of 6.0-6.8 (78% of commercial fields fall outside this range) (University of Georgia Extension)
• Sulfur deficiency affects bulb formation in 65% of cases

2. Climate Sensitivity

Key climate challenges:

• Temperature fluctuations cause bolting in 40-60% of plants
• Excessive moisture leads to fungal diseases in 80% of fields

3. Pest and Disease Pressure

Major threats to production:

• Thrips reduce yields by 25-50% in untreated fields
• Purple blotch disease causes 30-70% crop loss in humid regions

NO.2: Precision Fertilization Program

1. Soil Preparation

• Apply 2 tons/ha compost (use our compost activator for local production)
• Incorporate humic acid granules (400kg/ha) 2 weeks before planting
• Test soil and adjust pH with lime if needed

2. Vegetative Growth Stage

• 21-21-21+TE water-soluble fertilizer (200kg/ha) promotes leaf development
• Fish protein liquid (80L/ha) enhances root growth by 35%
• Foliar amino acid blend improves stress resistance

3. Bulb Formation Phase

• 10-40-10+TE increases bulb size by 20-30%
• MKP foliar spray (0-52-34) at 2kg/ha boosts quality
• Calcium application prevents 90% of storage rot

NO.3: Integrated Pest Management

1. Disease Prevention

• Trichoderma biofertilizer reduces fungal diseases by 60%
• Proper crop rotation decreases disease pressure by 40%

2. Insect Control

• Neem oil rotation manages 80% of thrips populations
• Kaolin clay applications prevent 70% of onion maggot damage

NO.4: Cost-Benefit Analysis of Production Systems

Data from FAO Onion Production Guide

NO.5: Global Success Case Studies

1. Spanish Commercial Operation

• Challenge: Low yields (30 tons/ha) and quality issues
• Solution:
  • Compost activator + 30-10-10 soil program
  • Microbial inoculants for soil health
• Result: 52 tons/ha (+73%) with superior shelf life

2. Egyptian Large-Scale Farm

• Innovation: Humic acid granules + drip irrigation
• Outcome: 35% water savings with 25% larger bulbs

For commercial-grade inputs: www.fertilizertrelfey.com/shop

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