Growing Rice (Upland) in Kiambu

Soil suitability analysis based on Kiambu's nutrient profile

Rice (Upland) can be grown in Kiambu County, but the soil scores 48/100 and needs targeted management to reach full potential. Local soils average pH 5.28 — moderately acidic and inside the 5–7 band Rice (Upland) prefers, so no lime is usually required. The main gap is nitrogen — measured at N 1.01 g/kg, P 13.7 mg/kg, K 169 mg/kg against this crop's high/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly clay soils suit Rice (Upland), which favours clay. At 1700 m, the county sits above Rice (Upland)'s preferred altitude ceiling of 1300 m, where frost risk and cold nights reduce the crop's productivity. Rice (Upland)'s full potential is about 1,800 kg/acre (~KES 189,000/acre at KES 105/kg), but at Kiambu's 48/100 suitability a realistic target here is closer to 1,080 kg/acre (~KES 113,400/acre) unless the constraints above are addressed.