Each field experiment was conducted under weed free conditions, using a strip split-plot design, with herbicides
applied to strips and cultivars applied to main plots with three replications. The cultivar main plots were
latinised so as not to occur more than once in the same bay. The field experiments were sown using a knife
point and press wheel seeding systems. Sowing dates of experiments were different in each region depending
on the season break. Seeding usually occurred within 3-4 weeks following opening rains to enable sufficient
weed germination for a good ‘knock-down’ to be applied before seeding. This usually resulted in experiments
being sown in late May to early June. An exception to this was in Wagga Wagga, NSW, where in two years an
early and late time of sowing separated by approximately one month were evaluated. Herbicide treatments were
applied using a small experimental plot spraying equipment fitted with air induction nozzles to deliver 80-100
L/ha water volume. Timing of herbicide treatments were based on those recommended by product labels (Table
1). After four weeks following each herbicide application, NDVI readings were recorded using a hand-held
Greenseeker®. Plots were then harvested with small experimental plot machinery at maturity to determine grain
yields. Grain samples were also used to measure quality parameters such as, 1000 grain weight, grain protein,
small grain screenings and test weight. Statistical analysis was performed using an ANOVA in GenStat (version
16) and if the trial design deviated from a regular strip-plot the REML procedure was used.