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Bambara groundnut

Crop details

Bambara groundnut

Vigna subterranea
Family: Fabaceae

Quick stats

Family Fabaceae
Typical harvest 0.8 t/ha
Varieties 1
Pests & diseases 4
Seasons 0

Crop profile

Growth habit annual
Days to harvest 100-150
Main uses Pulse; food security
Pollination self
Origin / where it grows Sub-Saharan Africa

Weather, soil & spacing

Best temperature 22–30 °C
Rainfall 500–900 mm/yr
Altitude 0–1600 m
Best pH 5.5–6.8
Soil type Sandy loam; light soils
Row spacing 60 cm
Plant spacing 30 cm
Planting depth 4 cm
Seed rate 50 kg/ha
Nursery days

Simple notes for farmers

About the crop: This crop is annual. You plant, grow and harvest it in one main season, then plant again. You can normally start harvesting about 100-150 days after planting, depending on care and variety.

Main use: Farmers mostly grow this crop for pulse; food security.

Pollination: This crop is mainly pollinated by self. Keeping flowers healthy and having insects like bees in the field helps improve fruit set and yields.

Where it grows: Sub-Saharan Africa It is grouped under: Legumes & Pulses.

Best climate: This crop does well in warm areas where the temperature is usually between 22 and 30 degrees Celsius. It prefers places that receive around 500 to 900 millimetres of rain in a year. It can grow from near sea level up to about 1600 metres above sea level.

Soil: The crop grows best in slightly acidic to near neutral soils, with a pH of about 5.5 to 6.8. It does well in sandy loam; light soils. Good drainage is important, so avoid waterlogged spots.

Plant spacing: Plant in rows about 60 centimetres apart, and leave about 30 centimetres between plants in the row. This gives each plant enough space for roots and canopy to spread.

Planting depth: Dig planting holes or furrows about 4 centimetres deep so the roots sit firmly in the soil but are not buried too deep.

Seed or planting material: Use around 50 kilograms of seed or planting material per hectare. Spread or plant evenly so the field has a good stand without being overcrowded.

Farmer guide (mwongozo wa mkulima)

Planting: Direct seed into warm, moist soil; inoculate with compatible rhizobia where available; keep weed-free during early growth.
Transplanting: Not transplanted; direct seeding recommended.
Irrigation: Moderate water demand; ensure moisture at flowering and pod set; avoid waterlogging.
Fertigation: Minimal N required due to fixation; supplement P and K on poor soils.
Pest scouting: Scout weekly for aphids, beetles, and foliar diseases; use sanitation and rotation.
Pruning: Not required; low bush habit.
Harvest: Harvest when pods are fully filled and leaves begin yellowing; dry pods adequately before shelling.
Postharvest: Dry to safe moisture; store in airtight containers; control bruchids if present.

Nutrient schedule (mbolea kwa hatua)

# Stage DAP Product Rate Targets (kg/ha) Notes
1 Basal 0 DAP 18-46-0 60 kg/ha N: —, P₂O₅: —, K₂O: — Band or place below seed; avoid seed burn

Nutrient requirements

Nutrient Stage Amount Unit
P₂O₅ Basal 25 kg/ha
K₂O Basal 20 kg/ha
N Topdress 0 kg/ha

Field images (picha shambani)

Bambara groundnut
Primary
Bambara groundnut
Bambara groundnut
Bambara groundnut
Bambara groundnut
Bambara groundnut
Name Country Maturity Traits
Local Bambara KE 130 Drought tolerant
Stage Product Rate (kg/ha) Notes
Basal DAP 18-46-0 60 Reduce if soil P is high
Name Type Symptoms Management
Aphids pest Spot sprays; natural enemies
Bruchids (storage) pest Proper drying; hermetic storage; insecticidal dusts where appropriate
Leaf spots disease Rotation; sanitation; avoid overhead irrigation
Root rots disease Improve drainage; avoid planting in poorly drained fields
System Typical Min Max Notes
rainfed smallholder 0.8 0.4 1.5
No season calendars yet.
Country Region Suitability
KE Eastern (semi-arid pockets)
KE Western
TZ Central semi-arid
UG Northern