Growing Groundnuts in Isiolo

Soil suitability analysis based on Isiolo's nutrient profile

Isiolo County is a challenging environment for Groundnuts (soil-match score 29/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Groundnuts's preferred 5–7 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.46 g/kg, P 37.4 mg/kg, K 395 mg/kg against this crop's low/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Groundnuts, which favours sandy. Isiolo receives approximately 350 mm/year — well below Groundnuts's minimum of 500 mm — so supplemental irrigation would be essential for this crop. Groundnuts's full potential is about 500 kg/acre (~KES 45,000/acre at KES 90/kg), but at Isiolo's 29/100 suitability a realistic target here is closer to 181 kg/acre (~KES 16,290/acre) unless the constraints above are addressed.