Fig. 1 Percentage of the total shattered seeds relative to seeds lost at harvest time of birdsfoot trefoil for six irrigation treatments in 1994 and 1995, and two treatments in 1996. Symbols indicate: D30–F50 see hard copy, D30–F100 see hard copy, D60–F50 see hard copy, D60–F100 see hard copy, LS see hard copy, C see hard copy. The six treatments were: D30–F50, single water replacement to 50% FC when soil-water depletion was 30% of available water; D30–F100, single water replacement to 100% FC when soil-water depletion was 30% available water; D60–F50, single water replacement to 50% FC when soil-water depletion was 60%; D60–F100, single water replacement to 100% FC when soil-water depletion was 60% available water; LS, low-stress, the soil-water content was maintained close to 100% field capacity (FC) during the period from early-June until 3 wk before seed harvest by two or to three water application replacements per week based on neutron attenuation soil-water content measurements; and C, a non-irrigated control. Dashed vertical lines indicate the times of peak shattering events. Vertical bars indicate the average standard error of the mean for the treatments
