Growing Pawpaw in Isiolo

Soil suitability analysis based on Isiolo's nutrient profile

Isiolo County is a challenging environment for Pawpaw (soil-match score 21/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Pawpaw's preferred 6–7.5 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 high/medium/high demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Pawpaw, which favours sandy loam. Isiolo receives approximately 350 mm/year — well below Pawpaw's minimum of 600 mm — so supplemental irrigation would be essential for this crop. Pawpaw's full potential is about 12,000 kg/acre (~KES 336,000/acre at KES 28/kg), but at Isiolo's 21/100 suitability a realistic target here is closer to 3,150 kg/acre (~KES 88,200/acre) unless the constraints above are addressed.