Assessment of potato tuber quality in Kenya: Baseline quality assessment survey report

Geoffrey, Baragu; Boukaka, Sedi Anne; and Azzarri, Carlo. 2025. Assessment of potato tuber quality in Kenya: Baseline quality assessment survey report. SFS4Youth Working Paper 13. Washington, DC: International Food Policy Research Institute. https://hdl.handle.net/10568/181383

Potato is the second most important staple crop in Kenya after maize, supporting its food security and providing livelihoods for millions in the value chain, including over 800,000 smallholder farmers. However, fragmented marketing systems, inadequate post-harvest infrastructure, and limited access to quality inputs constrain the performance of the sector and result in severe post-harvest losses. This qualitative study provides empirical analysis on potato tuber quality among 233 farmers in Nakuru and Nyandarua counties, and among traders six different main markets in Kenya. Our findings establish a baseline for potato quality at the farm-level and in major markets, tracking individual shipments to measure degradation during transit due to lack of crucial market conditions and logistical bottlenecks. Our main results reveal some important elements that need to be addressed. Overall, potato quality is compromised at the farm gate, but this initial damage is dramatically amplified post-harvest, with skin abrasions more than doubling and rotting increasing threefold as produce moves along the value chain. Critically, these losses are compounded by limited quality-based sorting and the inadequate use of storage infrastructure, with negligible adoption of cold storage. The study also demonstrates that local/traditional handling practices and poor infrastructure quality are bigger drivers of loss than transport distance. Our research concludes that most economic losses could be addressed, being the direct result of identifiable failures in infrastructure, handling, access to information, and quality governance throughout the value chain. Most aspects of which can be mitigated with digital tools. Indeed, digital tools can enhance farmer-buyer linkages, promote digital education and advisory services -also through collaboration with Farmer Service Centers, encourage cold storage via digital incentives. These recommendations position digital tools as a catalyst for transforming the potato value chain, both directly and indirectly mitigating post-harvest losses while boosting resilience and incomes.