Common bean (Phaseolus vulgaris L.) is the world’s most important legume for human consumption, according to Katungi et al 2010. Beans are a source of proteins which makes the Kenyan population depend highly on them. The market for beans is overwhelming, and depending on the quality and type of beans, the prices per 90kg bag of beans range between Sh7,000 and Sh12,000. The price is ...