Fig. 8. Water use efficiency (WUE) calculated as the ratio of simulated sorghum grain yield and water use for early-, medium-, and late-maturing cultivars planted on 15 May, 5 June, and 25 June for dryland, rain only, and rain supplemented with irrigation to replace daily ET of 2.5 mm d^–1 "deficit irrigation" and 5.0 mm d^–1 "full irrigation." Bars represent standard error.