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Data Recording
Using the data sheets supplied, document any and all adjustments made to the spreader
while conducting the pan test.
Using the funnel, transfer the contents of each catch pan into the corresponding test tube
for its position.
NOTE: It is highly recommended to only make ONE adjustment between each test. If
more than one adjustment is made it will hard to determine which adjustment is
responsible for the change in spread pattern shape.
Once you've obtained a desirable pattern, maximum driving centers can be determined.
In order to determine the maximum swath width, locate the points on both the left and
right side of the pattern where the amount of material applied is half of the amount at
the center of the pattern. The distance between these two points represents the optimal
swath width.
If spreading blended fertilizer, a visual inspection of the samples should be conducted in
order to determine if the blend within the swath is consistent with the desired blend. If
the blend is not consistent, a narrower swath should be used and a new optimal width
should be determined.
Driving Methods
During initial testing only one pass over the pans is required. Once an optimal swath
width is determined, a multiple pass test should be conducted to check the overlap areas
of the swath.
There are different types of multiple pass driving methods; however we recommend a 3
pass switch back method. The use of this method amplifies non-symmetrical patterns by
blending right side on right and left side on left.
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