Yam Growing Guide
A starchy tuber crop central to food security in West Africa, which produces over 90% of the world supply. White yam (D. rotundata) is the most commercially important of the 600+ Dioscorea species.
Growing Conditions
Soil Requirements
Soil Type & pH
Best soil types: sandy loam, loam, silt loam
pH range: 5.5 - 7 (optimal: 6)
Drainage: good
Nutrient Needs (N-P-K)
Planting Guide
Yield & Economics
Common Pests & Diseases
Common Pests
- yam beetle
- mealybugs
- nematodes
Common Diseases
- yam anthracnose
- yam mosaic virus
- dry rot
Use to identify issues early and prevent crop losses.
Growing Tips
Mound or ridge planting (30-40 cm high) is essential for proper tuber development and drainage.
Staking vines to 2-meter poles increases yields by 30-40% compared to unstaked plants.
Milking harvest (removing tuber while leaving vine intact) allows a second smaller tuber to form.
Frequently Asked Questions
How long does Yam take to grow?
Yam typically takes 240 days from planting to harvest. Seeds germinate in about 21 days. The best planting season is early_spring, late_spring.
What soil does Yam need?
Yam grows best in sandy loam, loam, silt loam soil with a pH of 5.5-7. Good drainage is required.
What temperature does Yam need?
Yam grows best at 25-30°C. Frost tolerance: none. Heat tolerance: moderate.
What is the expected yield for Yam?
Yam yields approximately 12,000 kg/hectare under good conditions.
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