The initiation of the purchase of the high clearance applicator was derived after the research officer (Grant Roberts) conducted experiments at seven different field sites in I997/1998 from Carrol in NSW to Bowenville in Queensland. In conducting these experiments it became obvious that a major limitation to managing these experiments was the ability to quickly apply herbicides to experimental plots in the field. At that time the researcher and assistant prepared herbicides the previous day and applied herbicides to trial plots using a 4m hand boom. Where large scale field trials were necessary it was nearly impossible to apply all the required treatments in the same week, which was necessary to maintain the integrity of the experimental design.