Sustainability of pistachio production (Pistacia vera L.) under supplemental irrigation in a Mediterranean climate. The paper looks at the effects of supplemental micro-irrigation in a commercial rainfed orchard. Irrigating with 10–15% of estimated full evaporative demand significantly increased average annual productivity by increasing yield in the on-crop year of this alternate bearing species. Irrigation increased yield by 30%, resulting in 1600 kg of in-shell product per ha.