PERFORMANCE EVALUATION OF A SMALL-SCALE IRISH POTATO (SOLANUM TUBEROSUM L.) HARVESTER

Authors

  • Martin Nanje University of Nairobi
  • Ayub N. Gitau University of Nairobi
  • Duncan O. Mbuge University of Nairobi

Abstract

Abstract

Irish potato is the most important non-cereal food crop in Kenya, contributing significantly to food security and the livelihoods of small-scale farmers. However, the labor-intensive nature of potato harvesting poses persistent drudgery, operational inefficiencies, and substantial on-harvest potato damage and post-harvest losses. This study presents design, development and performance evaluation of a small-scale Irish potato harvester for small-scale farmers in Kenya. The harvester incorporates mechanical and automated components for digging, soil-potato separation, and collecting potatoes efficiently, while allowing for adjustments to accommodate various potato varieties and sizes. Field trials have demonstrated substantial time and labor savings without compromising crop quality. The potato harvester has a demonstrated field capacity of 0.45 ha/hr at 0.5 m/s and 1.10 ha/hr at 1.5 m/s. After testing, it was found that it uses 4 hours less during harvesting compared to the manual method, saving the farmer significant amounts of time and labor. Farmers have responded with enthusiasm, about 85% of all who used the harvester expressed satisfaction with the harvester. There has  also been a 50% improvement in net profitability associated with using the machine. The collaborative approach with local stakeholders has ensured that the harvester aligns with the specific needs of Kenyan farmers, taking into account limited resources and technical expertise. This research underscores the potential for mechanization to transform potato farming in Kenya, fostering industry growth and enhancing the livelihoods of small-scale farmers.

 

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Published

2025-06-29

Issue

Section

III-Equipment Engineering for Plant Production