2015-08-282015-08-281995Kenya Agricultural Research Institute. (1995). Maize Variety National Performance Trial.https://kalroerepository.kalro.org/handle/0/11904Kenya covers a wide range of agro-ecological conditions, from the hot humid lowlands through semiarid midlands to the cool wet highlands, as defined by mega environments. There is no crop variety that can be adapted over such a wide range of agro-climatic conditions. Hence the need to develop varieties that fit particular mega-environments.enhttp://creativecommons.org/licenses/by/3.0/Book38Crop managementanalysisEcological zonesCultivars