Nearly 10 million Cambodians are small-scale subsistence rice farmers who depend on their rice crop for survival, but they also experience the lowest rice yields in the region due to poor nutrient levels in Cambodian soil. Their attempt at combating this is to spread granulated fertilizer on their rice paddies; unfortunately, this method results in a loss of 40-70% of the inputs while also polluting local waterways and air quality. In order to improve fertilizer efficiency, students in the 2011 Design for Extreme Affordability course in partnership with IDE-Cambodia, developed the RiceRunner - an easy to use fertilizer pellet applicator. This allows rice farmers to easily and accurately spread fertilizer in their soil and increase yields. Learn more about their project here: extreme.stanford.edu/projects/rice-runner.