Growing Cassava in Siaya

Soil suitability analysis based on Siaya's nutrient profile

Siaya County is well suited to Cassava, scoring 89/100 on ShambaIQ's soil-match model. Local soils average pH 5.33 — moderately acidic and inside the 4.5–7 band Cassava prefers, so no lime is usually required. The main gap is potassium — measured at N 1.2 g/kg, P 12.1 mg/kg, K 134 mg/kg against this crop's low/low/medium demand — so the fertilizer plan below prioritises closing that deficit. Cassava prefers sandy soils, while Siaya is largely clay loam, so drainage and organic-matter management matter more here. At current prices (about KES 15/kg) and a typical 4,000 kg/acre yield, a well-managed Cassava crop here can gross roughly KES 60,000 per acre.

89Suitability score

Soil match analysis

NutrientSiaya soilCassava needsStatus
pH5.334.57OK
Nitrogen1.2 g/kgmin 0.5 g/kgOK
Phosphorus12.1 mg/kgmin 6 mg/kgOK
Potassium134 mg/kgmin 150 mg/kgLow

Planting calendar

Long Rains

Month 1
Stem Cutting Planting
Month 2
Weeding & Pest Monitoring
Month 3
Growth Monitoring

Short Rains

Month 1
Weeding & Mound Formation
Month 2
Pest & Disease Scouting
Month 3
Growth Monitoring

Dry Season

Month 1
Harvesting (12+ months from planting)
Month 2
Processing & Storage
Month 3
Land Preparation for next crop

Top dressing guide

Product
None
Timing
None required
Instruction
Cassava is low-input. Excessive N causes leafy growth at expense of tubers.
Bags per Acre
0

Recommended seed varieties

TajirikaCoastal/Dryland
KALRO · 300-365 days · 4–6 tons/acre
High yielding; tolerant to cassava mosaic disease.
ShibeCoastal/Medium
KALRO · 270-330 days · 3–5 tons/acre
Sweet variety; low cyanide content; good for table use.

Economics

Market priceKES 15/kg
Expected yield4,000 kg/acre
Estimated revenueKES 60,000/acre

Preferred textureSandy

Fertilizer prices

DAP
KES 2,500(6,500)
CAN
KES 2,500(4,500)
NPK 17:17:17
KES 2,500(5,600)
Urea
KES 2,500(5,500)
Lime
KES 1,500(1,800)

Green = subsidized · (Commercial) per 50kg bag