Growing Lucerne in Tharaka Nithi
Soil suitability analysis based on Tharaka Nithi's nutrient profile
Yes, with the right inputs — Tharaka Nithi is moderately suited to Lucerne. Tharaka Nithi's soil (pH 4.99, strongly acidic) gives Lucerne a suitability score of 55/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.
Lucerne can be grown in Tharaka Nithi County, but the soil scores 55/100 and needs targeted management to reach full potential. At an average pH of 4.99 the soil is strongly acidic, below Lucerne's preferred 6.5–8 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.23 g/kg), phosphorus (19.6 mg/kg) and potassium (211 mg/kg) all meet Lucerne's requirements, so a maintenance fertilizer programme is enough. Lucerne prefers clay loam soils, while Tharaka Nithi is largely sandy loam, so drainage and organic-matter management matter more here. Lucerne's full potential is about 8,000 kg/acre (~KES 224,000/acre at KES 28/kg), but at Tharaka Nithi's 55/100 suitability a realistic target here is closer to 5,500 kg/acre (~KES 154,000/acre) unless the constraints above are addressed.
Soil & climate match
| Factor | Tharaka Nithi soil | Lucerne needs | Status |
|---|---|---|---|
| pH | 4.99 | 6.5–8 | Adjust |
| Nitrogen | 1.23 g/kg | min 0.5 g/kg | OK |
| Phosphorus | 19.6 mg/kg | min 12 mg/kg | OK |
| Potassium | 211 mg/kg | min 200 mg/kg | OK |
| Rainfall | 900 mm | 400–800 mm | High |
| Altitude | 1,100 m | 0–2,500 m | OK |
Top dressing guide
Recommended seed varieties
Economics
Fertilizer prices
Green = subsidized · (Commercial) per 50kg bag