Growing Rice (Upland) in Isiolo

Soil suitability analysis based on Isiolo's nutrient profile

Isiolo County is a challenging environment for Rice (Upland) (soil-match score 9/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Rice (Upland)'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 high/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. Rice (Upland) prefers clay soils, while Isiolo is largely sandy, so drainage and organic-matter management matter more here. Isiolo receives approximately 350 mm/year — well below Rice (Upland)'s minimum of 800 mm — so supplemental irrigation would be essential for this crop. Rice (Upland)'s full potential is about 1,800 kg/acre (~KES 189,000/acre at KES 105/kg), but at Isiolo's 9/100 suitability a realistic target here is closer to 203 kg/acre (~KES 21,315/acre) unless the constraints above are addressed.