Growing Green Grams in Vihiga
Soil suitability analysis based on Vihiga's nutrient profile
Generally not ideal — Vihiga is poorly suited to Green Grams. Vihiga's soil (pH 5.62, slightly acidic) gives Green Grams a suitability score of 38/100. Match fertilizer to Vihiga's nitrogen and phosphorus levels for the best result.
Vihiga County is a challenging environment for Green Grams (soil-match score 38/100) and will need significant amendment before planting. Local soils average pH 5.62 — slightly acidic to near-neutral and inside the 5.5–8 band Green Grams prefers, so no lime is usually required. Nitrogen (1.02 g/kg), phosphorus (14.8 mg/kg) and potassium (164 mg/kg) all meet Green Grams's requirements, so a maintenance fertilizer programme is enough. Green Grams prefers sandy loam soils, while Vihiga is largely clay loam, so drainage and organic-matter management matter more here. Green Grams's full potential is about 400 kg/acre (~KES 48,000/acre at KES 120/kg), but at Vihiga's 38/100 suitability a realistic target here is closer to 190 kg/acre (~KES 22,800/acre) unless the constraints above are addressed.
Soil & climate match
| Factor | Vihiga soil | Green Grams needs | Status |
|---|---|---|---|
| pH | 5.62 | 5.5–8 | OK |
| Nitrogen | 1.02 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 14.8 mg/kg | min 6 mg/kg | OK |
| Potassium | 164 mg/kg | min 100 mg/kg | OK |
| Rainfall | 1,800 mm | 250–700 mm | High |
| Altitude | 1,700 m | 0–1,800 m | OK |
Top dressing guide
Recommended seed varieties
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag