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This paper considers the possibility of the diffusion of NERICA, new upland rice varieties, in the Kenya's central highlands, where few farmers have ever grown upland rice, particularly focusing on the role of irrigation schemes. The data we use were collected from 160 member farmers of 4 irrigation schemes and 80 non-member farmers living in the same command area of the irrigation through our own survey conducted in March 2012 at the beginning of the long rain season of 2012. We find that among the member farmers those who have more irrigation taps tend to adopt NERICA, implying that water availability from irrigation is an important factor that encourages farmers to grow NERICA. As for the knowledge about upland rice, we find that those who have heard about upland rice and/or have seen rice growing on upland are more willing to purchase or receive NERICA seed. If we compare farmers belonging to an irrigation scheme and farmers not belonging to any irrigation scheme, the former have better knowledge about upland rice. Thus, the irrigation schemes have a role of information dissemination among members, which may reduce the risk of the failure of new crop.

Dual Role of Irrigation Schemes for NERICA Diffusion in the Central Highlands in Kenya: Sources of Supplemental Water and Technology Information