Growing Rice (Upland) in Isiolo
Soil suitability analysis based on Isiolo's nutrient profile
Generally not ideal — Isiolo is poorly suited to Rice (Upland). Isiolo's soil (pH 7.83, alkaline) gives Rice (Upland) a suitability score of 9/100. Match fertilizer to Isiolo's nitrogen and phosphorus levels for the best result.
Isiolo County is a challenging environment for Rice (Upland) (soil-match score 9/100) and will need significant amendment before planting. At an average pH of 7.83 the soil sits above Rice (Upland)'s preferred 5–7 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.46 g/kg, P 37.4 mg/kg, K 395 mg/kg against this crop's high/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. Rice (Upland) prefers clay soils, while Isiolo is largely sandy, so drainage and organic-matter management matter more here. Isiolo receives approximately 350 mm/year — well below Rice (Upland)'s minimum of 800 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, Rice (Upland) is the #77 soil match of the 106 crops we assess for Isiolo County. Rice (Upland)'s full potential is about 1,800 kg/acre (~KES 189,000/acre at KES 105/kg), but at Isiolo's 9/100 suitability a realistic target here is closer to 203 kg/acre (~KES 21,315/acre) unless the constraints above are addressed.
Better matched to Isiolo's soil: Sisal, Aloe Vera, and Green Grams — each scores higher on the same soil.
Soil & climate match
| Factor | Isiolo soil | Rice (Upland) needs | Status |
|---|---|---|---|
| pH | 7.83 | 5–7 | Adjust |
| Nitrogen | 0.46 g/kg | min 1.2 g/kg | Low |
| Phosphorus | 37.4 mg/kg | min 12 mg/kg | OK |
| Potassium | 395 mg/kg | min 150 mg/kg | OK |
| Rainfall | 350 mm | 800–2,000 mm | Low |
| Altitude | 900 m | 0–1,300 m | OK |
Top dressing guide
Isiolo's nitrogen (0.46 g/kg) is 38% of the 1.2 g/kg Rice (Upland) needs, so the standard 1 bag/acre is raised to 1.5. Split it across two applications to limit leaching.
Seed varieties for Isiolo
Varieties suited to Isiolo's 900 m altitude and 350 mm annual rainfall — 1 of 2 rice (upland) varieties we list.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag