Growing Cashew Nuts in Laikipia

Soil suitability analysis based on Laikipia's nutrient profile

Laikipia County is a challenging environment for Cashew Nuts (soil-match score 6/100) and will need significant amendment before planting. At an average pH of 4.99 the soil is strongly acidic, below Cashew Nuts's preferred 5–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.42 g/kg), phosphorus (16.6 mg/kg) and potassium (215 mg/kg) all meet Cashew Nuts's requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy loam soils suit Cashew Nuts, which favours sandy. At 1700 m, the county sits above Cashew Nuts's preferred altitude ceiling of 500 m, where frost risk and cold nights reduce the crop's productivity. Cashew Nuts's full potential is about 900 kg/acre (~KES 247,500/acre at KES 275/kg), but at Laikipia's 6/100 suitability a realistic target here is closer to 68 kg/acre (~KES 18,700/acre) unless the constraints above are addressed.