Growing Bambara Nuts in Kitui

Soil suitability analysis based on Kitui's nutrient profile

Quick answer

Yes, with the right inputs — Kitui is moderately suited to Bambara Nuts. Kitui's soil (pH 7.03, near-neutral) gives Bambara Nuts a suitability score of 70/100. Match fertilizer to Kitui's nitrogen and phosphorus levels for the best result.

Kitui County is a solid choice for Bambara Nuts, with a soil-match score of 70/100. At an average pH of 7.03 the soil sits above Bambara Nuts's preferred 5–6.5 range, which can limit uptake of phosphorus and micronutrients. Nitrogen (0.74 g/kg), phosphorus (30.5 mg/kg) and potassium (339 mg/kg) all meet Bambara Nuts's requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy loam soils suit Bambara Nuts, which favours sandy. On ShambaIQ's soil-match model, Bambara Nuts is the #40 soil match of the 106 crops we assess for Kitui County. Bambara Nuts's full potential is about 400 kg/acre (~KES 60,000/acre at KES 150/kg), but at Kitui's 70/100 suitability a realistic target here is closer to 350 kg/acre (~KES 52,500/acre) unless the constraints above are addressed.

70Suitability score

Soil & climate match

FactorKitui soilBambara Nuts needsStatus
pH7.0356.5Adjust
Nitrogen0.74 g/kgmin 0.5 g/kgOK
Phosphorus30.5 mg/kgmin 6 mg/kgOK
Potassium339 mg/kgmin 100 mg/kgOK
Rainfall500 mm500–800 mmOK
Altitude900 m0–1,600 mOK

Recommended seed varieties

Local CreamLowland/Medium 0-1600m
Local · 120-150 days · 4-6 bags/acre
Drought resistant; pods develop underground; high protein and soil building.
Local RedLowland/Medium 0-1600m
Local · 130-160 days · 3-5 bags/acre
Highly nutritious; rich in iron; excellent drought tolerance.

Economics

Market priceKES 150/kg
Expected yield in Kitui350 kg/acre
Estimated revenueKES 52,500/acre
Adjusted for Kitui's 70/100 suitability. Under ideal conditions Bambara Nuts can reach 400 kg/acre (~KES 60,000/acre) — attainable here only after the climate and soil constraints below are addressed.

Preferred textureSandy

Fertilizer prices

DAP
KES 3,500(6,500)
CAN
KES 2,875(5,700)
NPK 17:17:17
KES 3,275(5,600)
Urea
KES 3,500(5,500)
Lime
KES 1,500(1,800)

Green = subsidized · (Commercial) per 50kg bag