Growing Garden Peas in Turkana

Soil suitability analysis based on Turkana's nutrient profile

Quick answer

Generally not ideal — Turkana is poorly suited to Garden Peas. Turkana's soil (pH 7.95, alkaline) gives Garden Peas a suitability score of 1/100. Match fertilizer to Turkana's nitrogen and phosphorus levels for the best result.

Turkana County is a challenging environment for Garden Peas (soil-match score 1/100) and will need significant amendment before planting. At an average pH of 7.95 the soil sits above Garden Peas's preferred 5.5–7 range, which can limit uptake of phosphorus and micronutrients. The main gap is nitrogen — measured at N 0.41 g/kg, P 38.5 mg/kg, K 417 mg/kg against this crop's low/medium/medium demand — so the fertilizer plan below prioritises closing that deficit. The county's predominantly sandy soils suit Garden Peas, which favours sandy loam. Turkana receives approximately 300 mm/year — well below Garden Peas's minimum of 800 mm — so supplemental irrigation would be essential for this crop. On ShambaIQ's soil-match model, Garden Peas is the #96 soil match of the 106 crops we assess for Turkana County. Garden Peas's full potential is about 2,500 kg/acre (~KES 362,500/acre at KES 145/kg), but at Turkana's 1/100 suitability a realistic target here is closer to 31 kg/acre (~KES 4,495/acre) unless the constraints above are addressed.

Better matched to Turkana's soil: Sisal, Aloe Vera, and Green Grams — each scores higher on the same soil.

1Suitability score

Soil & climate match

FactorTurkana soilGarden Peas needsStatus
pH7.955.57Adjust
Nitrogen0.41 g/kgmin 0.5 g/kgLow
Phosphorus38.5 mg/kgmin 12 mg/kgOK
Potassium417 mg/kgmin 150 mg/kgOK
Rainfall300 mm800–2,100 mmLow
Altitude400 m1,500–2,600 mLow

Recommended seed varieties

Njabini (PI Moto super)Highland 1500-2600m
Simlaw Seeds · 60-90 days · 8-9 bags/acre
Dual purpose (fresh & dry); drought tolerant; requires vertical trailing.
GreenwichHighland 1600-2600m
Agventure Limited / RAGT · 90-120 days · 5-19 bags/acre
Large green grain; dual purpose; good soakability & rapid cookability.
KWS KariokaHighland 1600-2600m
Agventure Limited / KWS · 90-120 days · 5-17 bags/acre
Medium green grain; dual purpose; good color retention.
Blue MoonHighland 1200-2400m
Maribo DK · 120 days · 13-18 bags/acre
Good lodging resistance; strong straw; French-bred (2016).

Economics

Market priceKES 145/kg
Expected yield in Turkana31 kg/acre
Estimated revenueKES 4,495/acre
Adjusted for Turkana's 1/100 suitability. Under ideal conditions Garden Peas can reach 2,500 kg/acre (~KES 362,500/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