General Information 65
NOZZLE SPACING AFFECTS G.P.A.
20 GPA nozzles spaced 20 inches apart will ap-
ply 20 gallons per acre. Spaced 40 inches apart,
10 gallons per acre.
PRESSURE AFFECTS G.P.A.
When you increase pressure, you increase noz-
zle output. Double nozzle output increases pres-
sure four times. Too much pressure also causes
drifting.
TRACTOR SPEED AFFECTS G.P.A.
If you are using 30 Gallon, Per Acre Tips and
traveling 4 miles per hour, you are applying 30
gallons per acre. If you increase your speed to 6
miles per hour, using the same nozzle, you will
apply 20 gallons per acre.
NOZZLE TYPE
The first step in setting up a sprayer is to select
the proper nozzle type. Be sure to check nozzle
type, spray angle, and boom height as described
below.
There are many types of nozzles. Select the type
and size best suited for the work to be done.
Popular types used are:
1. FLAT FAN nozzles have a tapered edge pat-
tern so a slight overlapping gives uniform
coverage. Spray tips should be rotated ap-
proximately 12 degrees so that patterns are
slightly offset. They are used primarily for
broadcast spraying of herbicides and insec-
ticides.
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