Growing Sweet Corn in Mandera

Soil suitability analysis based on Mandera's nutrient profile

Mandera County is a challenging environment for Sweet Corn (soil-match score 6/100) and will need significant amendment before planting. At an average pH of 8.38 the soil sits above Sweet Corn's preferred 5.8–7 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.53 g/kg, P 38.3 mg/kg, K 420 mg/kg against this crop's high/high/medium demand — so the fertilizer plan below prioritises closing that deficit. Sweet Corn prefers loam soils, while Mandera is largely sandy, so drainage and organic-matter management matter more here. Mandera receives approximately 180 mm/year — well below Sweet Corn's minimum of 500 mm — so supplemental irrigation would be essential for this crop. Sweet Corn's full potential is about 8,000 kg/acre (~KES 320,000/acre at KES 40/kg), but at Mandera's 6/100 suitability a realistic target here is closer to 600 kg/acre (~KES 24,000/acre) unless the constraints above are addressed.