Growing Wheat in Kirinyaga

Soil suitability analysis based on Kirinyaga's nutrient profile

Kirinyaga County is a challenging environment for Wheat (soil-match score 35/100) and will need significant amendment before planting. At an average pH of 5.31 the soil is moderately acidic, below Wheat's preferred 6–7.5 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. The county's predominantly clay soils suit Wheat, which favours clay. Wheat's full potential is about 2,000 kg/acre (~KES 100,000/acre at KES 50/kg), but at Kirinyaga's 35/100 suitability a realistic target here is closer to 875 kg/acre (~KES 43,750/acre) unless the constraints above are addressed.