Growing Bambara Nuts in Garissa

Soil suitability analysis based on Garissa's nutrient profile

Garissa County is a challenging environment for Bambara Nuts (soil-match score 14/100) and will need significant amendment before planting. At an average pH of 7.96 the soil sits above Bambara Nuts's preferred 5–6.5 range, which can limit uptake of phosphorus and micronutrients. Nitrogen (0.61 g/kg), phosphorus (37.7 mg/kg) and potassium (407 mg/kg) all meet Bambara Nuts's requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy soils suit Bambara Nuts, which favours sandy. Garissa receives approximately 250 mm/year — well below Bambara Nuts's minimum of 500 mm — so supplemental irrigation would be essential for this crop. At current prices (about KES 150/kg) and a typical 300 kg/acre yield, a well-managed Bambara Nuts crop here can gross roughly KES 45,000 per acre.