Growing Cowpeas in Nyamira
Soil suitability analysis based on Nyamira's nutrient profile
Possible but challenging — Nyamira is only marginally suited to Cowpeas. Nyamira's soil (pH 5.58, slightly acidic) gives Cowpeas a suitability score of 40/100. Match fertilizer to Nyamira's nitrogen and phosphorus levels for the best result.
Nyamira County is a challenging environment for Cowpeas (soil-match score 40/100) and will need significant amendment before planting. Local soils average pH 5.58 — slightly acidic to near-neutral and inside the 5–8 band Cowpeas prefers, so no lime is usually required. Nitrogen (0.84 g/kg), phosphorus (11.6 mg/kg) and potassium (148 mg/kg) all meet Cowpeas's requirements, so a maintenance fertilizer programme is enough. Cowpeas prefers sandy soils, while Nyamira is largely clay loam, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Cowpeas is the #83 soil match of the 106 crops we assess for Nyamira County. Cowpeas's full potential is about 450 kg/acre (~KES 29,250/acre at KES 65/kg), but at Nyamira's 40/100 suitability a realistic target here is closer to 225 kg/acre (~KES 14,625/acre) unless the constraints above are addressed.
Better matched to Nyamira's soil: Sweet Potato, Soybeans, and Pineapple — each scores higher on the same soil.
Soil & climate match
| Factor | Nyamira soil | Cowpeas needs | Status |
|---|---|---|---|
| pH | 5.58 | 5–8 | OK |
| Nitrogen | 0.84 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 11.6 mg/kg | min 6 mg/kg | OK |
| Potassium | 148 mg/kg | min 100 mg/kg | OK |
| Rainfall | 1,600 mm | 250–700 mm | High |
| Altitude | 1,700 m | 0–1,800 m | OK |
Top dressing guide
Nyamira's nitrogen reads 0.84 g/kg, but the rate stays at zero: Cowpeas is not top-dressed, for the crop-specific reason above.
Seed varieties for Nyamira
Varieties suited to Nyamira's 1,700 m altitude and 1,600 mm annual rainfall — 1 of 2 cowpeas varieties we list.
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag