Growing Sorghum in Kirinyaga

Soil suitability analysis based on Kirinyaga's nutrient profile

Kirinyaga County is a challenging environment for Sorghum (soil-match score 43/100) and will need significant amendment before planting. Local soils average pH 5.31 — moderately acidic and inside the 5–8 band Sorghum prefers, so no lime is usually required. Nitrogen (1.36 g/kg), phosphorus (12.5 mg/kg) and potassium (177 mg/kg) all meet Sorghum's requirements, so a maintenance fertilizer programme is enough. The county's predominantly clay soils suit Sorghum, which favours clay. Sorghum's full potential is about 1,200 kg/acre (~KES 81,600/acre at KES 68/kg), but at Kirinyaga's 43/100 suitability a realistic target here is closer to 645 kg/acre (~KES 43,860/acre) unless the constraints above are addressed.