Research on agriculture, water and irrigation described by I. Garciatejero and colleagues.

"The impact that different regulated-deficit irrigation (RDI) treatments exert on a 12-year-old orange orchard (Citrus sinensis L. Osbeck, cv. salustiano) was studied from 2004 to 2007. The experiment consisted of a control irrigation treatment which was irrigated at 100% of the crop evapotranspiration (ETc) values for the whole season, and three deficit treatments imposed as a function of the water-stress index (WSI), which is defined as the ratio of the actual volume of water supply to the ETc rate," scientists writing in the journal Agricultural Water Management report.

"In our case, these WSI values were 0.75, 0.65, and 0.50, respectively. The stem-water potential at noon …