Growing Sweet Orange in Samburu

Soil suitability analysis based on Samburu's nutrient profile

Samburu County is a challenging environment for Sweet Orange (soil-match score 18/100) and will need significant amendment before planting. At an average pH of 8.28 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 0.67 g/kg, P 42.1 mg/kg, K 387 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 Samburu is largely sandy, so drainage and organic-matter management matter more here. Samburu receives approximately 350 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 Samburu's 18/100 suitability a realistic target here is closer to 2,700 kg/acre (~KES 135,000/acre) unless the constraints above are addressed.