[[Image:solar market garden.jpg|thumb|right|250px|Solar Market Garden project hooks up solar panels to a drip-system. Photo: [http://self.org/ Solar Electric Light Fund.]]]
* Zimbabwe study: [http://wwwoar.icrisat.org/journal2386/volume51/aes/aes3Can_drip_irrigation_improve1.pdf Can drip irrigation improve the livelihoods of smallholders? Lessons learned from Zimbabwe].