Growing Lucerne in Mandera

Soil suitability analysis based on Mandera's nutrient profile

Mandera County is a challenging environment for Lucerne (soil-match score 14/100) and will need significant amendment before planting. At an average pH of 8.38 the soil sits above Lucerne's preferred 6.5–8 range, which can limit uptake of phosphorus and micronutrients. Nitrogen (0.53 g/kg), phosphorus (38.3 mg/kg) and potassium (420 mg/kg) all meet Lucerne's requirements, so a maintenance fertilizer programme is enough. Lucerne prefers clay loam soils, while Mandera is largely sandy, so drainage and organic-matter management matter more here. Mandera receives approximately 180 mm/year — well below Lucerne's minimum of 400 mm — so supplemental irrigation would be essential for this crop. Lucerne's full potential is about 8,000 kg/acre (~KES 224,000/acre at KES 28/kg), but at Mandera's 14/100 suitability a realistic target here is closer to 1,400 kg/acre (~KES 39,200/acre) unless the constraints above are addressed.