2015-08-042015-08-0494Kenya Agriculture Research Institute. (1997). Ministry Of Agriculture ILRI Collaborative Research Project Report May 1997.https://kalroerepository.kalro.org/handle/0/8035Gratitude is expressed to all of the Kiambu District staff of the Ministry of Agriculture (MoA) who contributed to this study. Acknowledgement is also made of important assistance from the Animal Production office of MoA Headquarters, the Central Province and Nairobi Provincial MoA offices, the KARI National Agricultural Research Centre at Muguga, the National Veterinary Research Centre and the office of Animal Production at KARI Headquarters.enhttp://creativecommons.org/licenses/by/3.0/Book94CattleHouseholdsHeifersAge