Growing Green Grams in Wajir
Soil suitability analysis based on Wajir's nutrient profile
Generally not ideal — Wajir is poorly suited to Green Grams. Wajir's soil (pH 8.4, alkaline) gives Green Grams a suitability score of 38/100. Match fertilizer to Wajir's nitrogen and phosphorus levels for the best result.
Wajir County is a challenging environment for Green Grams (soil-match score 38/100) and will need significant amendment before planting. At an average pH of 8.4 the soil sits above Green Grams's preferred 5.5–8 range, which can limit uptake of phosphorus and micronutrients. Nitrogen (0.52 g/kg), phosphorus (39.3 mg/kg) and potassium (396 mg/kg) all meet Green Grams's requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy soils suit Green Grams, which favours sandy loam. Green Grams's full potential is about 400 kg/acre (~KES 48,000/acre at KES 120/kg), but at Wajir'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 | Wajir soil | Green Grams needs | Status |
|---|---|---|---|
| pH | 8.4 | 5.5–8 | Adjust |
| Nitrogen | 0.52 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 39.3 mg/kg | min 6 mg/kg | OK |
| Potassium | 396 mg/kg | min 100 mg/kg | OK |
| Rainfall | 200 mm | 250–700 mm | Low |
| Altitude | 250 m | 0–1,800 m | OK |
Top dressing guide
Recommended seed varieties
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag