Growing Sweet Orange in Turkana

Soil suitability analysis based on Turkana's nutrient profile

Turkana County is a challenging environment for Sweet Orange (soil-match score 14/100) and will need significant amendment before planting. At an average pH of 7.95 the soil sits above Sweet Orange's preferred 6–7.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.41 g/kg, P 38.5 mg/kg, K 417 mg/kg against this crop's high/high/high demand — so the fertilizer plan below prioritises closing that deficit. Sweet Orange prefers loam soils, while Turkana is largely sandy, so drainage and organic-matter management matter more here. Turkana receives approximately 300 mm/year — well below Sweet Orange's minimum of 600 mm — so supplemental irrigation would be essential for this crop. Sweet Orange's full potential is about 12,000 kg/acre (~KES 600,000/acre at KES 50/kg), but at Turkana's 14/100 suitability a realistic target here is closer to 2,100 kg/acre (~KES 105,000/acre) unless the constraints above are addressed.