Growing Soybeans in Isiolo

Soil suitability analysis based on Isiolo's nutrient profile

Isiolo County is a challenging environment for Soybeans (soil-match score 20/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Soybeans'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. Soybeans prefers loam soils, while Isiolo is largely sandy, so drainage and organic-matter management matter more here. Isiolo receives approximately 350 mm/year — well below Soybeans's minimum of 600 mm — so supplemental irrigation would be essential for this crop. Soybeans's full potential is about 700 kg/acre (~KES 52,500/acre at KES 75/kg), but at Isiolo's 20/100 suitability a realistic target here is closer to 175 kg/acre (~KES 13,125/acre) unless the constraints above are addressed.