Summary<BR> 3-way interaction between tractor speed, GPA, and nozzle type <BR> <BR> HC nozzles provided less coverage than XR-FF nozzles <BR> <BR>Tractor speed <BR>FF and 20 GPA = 3.5 mph > 5.0 mph = 7.0 mph <BR>HC and 10 GPA = 3.5 mph > 5.0 mph = 7.0 mph <BR>HC and 15 GPA = 3.5 mph > 7.0 mph <BR> <BR> increases in GPA improved coverage <BR>20 GPA > 15 GPA > 10 GPA <BR> <BR> best coverage (45%) <BR>3.5 MPH/20 GPA/XR-FF <BR> <BR> least coverage (12%) <BR>7.0 MPH/10 GPA/HC <BR>