Growing Oilseed Rape (Canola) in Kirinyaga

Soil suitability analysis based on Kirinyaga's nutrient profile

Oilseed Rape (Canola) can be grown in Kirinyaga County, but the soil scores 50/100 and needs targeted management to reach full potential. At an average pH of 5.31 the soil is moderately acidic, below Oilseed Rape (Canola)'s preferred 5.8–7.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is phosphorus — measured at N 1.36 g/kg, P 12.5 mg/kg, K 177 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 Kirinyaga is largely clay, so drainage and organic-matter management matter more here. Oilseed Rape (Canola)'s full potential is about 1,000 kg/acre (~KES 60,000/acre at KES 60/kg), but at Kirinyaga's 50/100 suitability a realistic target here is closer to 625 kg/acre (~KES 37,500/acre) unless the constraints above are addressed.