Jun 13, 2009 - Howz e Madad, Kandahar Province, Afghanistan - Afghan farmers ride on the back of a tractor after a day of working in the fields in the Howz e Madad in Zhari (aka Zharey) District in Kandahar Province, Afghanistan. This area just west of Kandahar City is considered a green zone with huge areas of agricultural activity in vicinity to the Arghandab River. The complex irrigation system which could double if improved is tied to the Dahla Dam which is a major reconstruction project funded by the Canadian government..(Credit Image: © Louie Palu/louie Palu/ZUMA Press)