Growing Yams in Homa Bay

Soil suitability analysis based on Homa Bay's nutrient profile

Quick answer

Yes, with the right inputs — Homa Bay is moderately suited to Yams. Homa Bay's soil (pH 5.27, strongly acidic) gives Yams a suitability score of 69/100. Apply agricultural lime before planting to unlock phosphorus and lift the score.

Homa Bay County is a solid choice for Yams, with a soil-match score of 69/100. At an average pH of 5.27 the soil is moderately acidic, below Yams's preferred 5.5–6.5 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. The main gap is potassium — measured at N 1.05 g/kg, P 13.8 mg/kg, K 147 mg/kg against this crop's medium/medium/high demand — so the fertilizer plan below prioritises closing that deficit. Yams prefers sandy loam soils, while Homa Bay is largely clay loam, so drainage and organic-matter management matter more here. On ShambaIQ's soil-match model, Yams is the #40 soil match of the 106 crops we assess for Homa Bay County. Yams's full potential is about 7,000 kg/acre (~KES 560,000/acre at KES 80/kg), but at Homa Bay's 69/100 suitability a realistic target here is closer to 6,038 kg/acre (~KES 483,040/acre) unless the constraints above are addressed.

69Suitability score

Soil & climate match

FactorHoma Bay soilYams needsStatus
pH5.275.56.5Adjust
Nitrogen1.05 g/kgmin 0.8 g/kgOK
Phosphorus13.8 mg/kgmin 12 mg/kgOK
Potassium147 mg/kgmin 200 mg/kgLow
Rainfall1,100 mm1,200–1,800 mmLow
Altitude1,200 m0–1,800 mOK

Recommended seed varieties

Local White (Nyandarua/Meru)Medium/Highland 1000-1800m
Local · 240-300 days · 2.5–3.5 tons/acre
Traditional tuber crop; highly valued for food security; propagated via tuber sets.
Local PurpleMedium/Highland 1000-1800m
Local · 270-330 days · 2–3 tons/acre
Vigorous climbing vine; highly nutritious tuber.

Economics

Market priceKES 80/kg
Expected yield in Homa Bay6,038 kg/acre
Estimated revenueKES 483,040/acre
Adjusted for Homa Bay's 69/100 suitability. Under ideal conditions Yams can reach 7,000 kg/acre (~KES 560,000/acre) — attainable here only after the climate and soil constraints below are addressed.

Preferred textureSandy Loam

Fertilizer prices

DAP
KES 3,500(6,500)
CAN
KES 2,875(5,700)
NPK 17:17:17
KES 3,275(5,600)
Urea
KES 3,500(5,500)
Lime
KES 1,500(1,800)

Green = subsidized · (Commercial) per 50kg bag