Growing Soybeans in Garissa

Soil suitability analysis based on Garissa's nutrient profile

Garissa County is a challenging environment for Soybeans (soil-match score 10/100) and will need significant amendment before planting. At an average pH of 7.96 the soil sits above Soybeans's preferred 5–7 range, which can limit uptake of phosphorus and micronutrients. Nitrogen (0.61 g/kg), phosphorus (37.7 mg/kg) and potassium (407 mg/kg) all meet Soybeans's requirements, so a maintenance fertilizer programme is enough. Soybeans prefers loam soils, while Garissa is largely sandy, so drainage and organic-matter management matter more here. Garissa receives approximately 250 mm/year — well below Soybeans's minimum of 600 mm — so supplemental irrigation would be essential for this crop. Soybeans's full potential is about 700 kg/acre (~KES 52,500/acre at KES 75/kg), but at Garissa's 10/100 suitability a realistic target here is closer to 88 kg/acre (~KES 6,600/acre) unless the constraints above are addressed.