Growing Oilseed Rape (Canola) in Garissa

Soil suitability analysis based on Garissa's nutrient profile

Garissa County is a challenging environment for Oilseed Rape (Canola) (soil-match score 0/100) and will need significant amendment before planting. At an average pH of 7.96 the soil sits above Oilseed Rape (Canola)'s preferred 5.8–7.5 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.61 g/kg, P 37.7 mg/kg, K 407 mg/kg against this crop's high/high/medium demand — so the fertilizer plan below prioritises closing that deficit. Oilseed Rape (Canola) prefers loam soils, while Garissa is largely sandy, so drainage and organic-matter management matter more here. Garissa receives approximately 250 mm/year — well below Oilseed Rape (Canola)'s minimum of 400 mm — so supplemental irrigation would be essential for this crop. Oilseed Rape (Canola)'s full potential is about 1,000 kg/acre (~KES 60,000/acre at KES 60/kg), but at Garissa's 0/100 suitability a realistic target here is closer to 0 kg/acre (~KES 0/acre) unless the constraints above are addressed.