For farmers in Kenya, creative ways to irrigate crops can be the difference between a harvest failing or thriving. In this drought-prone country, access to reliable water sources is a daily challenge.
 
Few would argue with the need for better irrigation. Yet certain techniques introduced by the government to spur food production have dangerous side effects, warns Bernard Bett, a veterinary epidemiologist at the International Livestock Research Institute in Kenya. The pools and canals that underpin flood irrigation crea