Growing Macadamia in Marsabit

Soil suitability analysis based on Marsabit's nutrient profile

Marsabit County is a challenging environment for Macadamia (soil-match score 9/100) and will need significant amendment before planting. At an average pH of 8.22 the soil sits above Macadamia's preferred 4.5–6.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.52 g/kg, P 37.3 mg/kg, K 420 mg/kg against this crop's medium/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. Macadamia prefers loam soils, while Marsabit is largely sandy, so drainage and organic-matter management matter more here. Marsabit receives approximately 300 mm/year — well below Macadamia's minimum of 700 mm — so supplemental irrigation would be essential for this crop. Macadamia's full potential is about 1,800 kg/acre (~KES 198,000/acre at KES 110/kg), but at Marsabit's 9/100 suitability a realistic target here is closer to 203 kg/acre (~KES 22,330/acre) unless the constraints above are addressed.