Great Plains 3S-5000HDF Material Rate - Manual (Page 19)

Great Plains Manufacturing, Inc. Table of Contents Main Box Rates Setting Fertilizer Rate 17
2012-06-04 Table of Contents Main Box Rates 195-325B
5. Record the weight of one to three empty containers
collectively large enough to hold fertilizer metered for
6% of one acre.
6. Place several pounds of fertilizer over three fertilizer
openings the outside end of the left drill box. Pull
lower end fertilizer hoses off of these drops at the
opener end.
7. Turn gauge wheel several times to fill flute cups. Turn
until fertilizer drops to ground from each hose.
8. Place empty container(s) under the three hoses to
gather metered fertilizer.
9. Turn gauge wheel until one acre is tallied on
acremeter (see table at right). While turning, check
that cups have ample fertilizer coming into them.
10. Weigh metered fertilizer. Subtract initial weight of
container(s).
11. Divide the net fertilizer weight by three. Multiply by
number of openers on your drill to determine the
total of pounds-per-acre applied.
12. Subtract to calculate the difference between the
measured rate and the original target rate.
13. If a Density Adjustment was made (see page 14),
apply it to the variance.
For example:
three empty 1.8 pound containers weigh: 5.4 lbs
Possible Agricultural Chemical Hazard:
Follow
material supplier recommendations for safety
precautions in handling fertilizer.
Calibration Gauge Wheel Rotations
Drill Model Per Acre Per Hectare
2S-2600/F/HD/HDF 203 502
3S-3000/F/HD/HDF 175 432
3S-4000/F/HD/HDF 130 321
3S-5000/F/HD/HDF 104 271
For example:
the three containers weighed a total of 10.0 pounds
after test: 4.6 lbs net
NetWeight GrossWeight ContainerWeights – =
For example:
a 63-row (7.5 inch) drill: 96.6 lbs/ac
96.6
4.6
3
------ 63
×
= MeasuredRate
NetWeight
3
------------------------- RowCount ×
=
For example:
the target rate was 78 lbs/ac:
new variance=19
18.6 96.6 78 – =
Variance TargetRate MeasuredRate – =
In the example, we are using 65 pound material, so no
correction factor is applied.
AdjustedVariance Variance CorrectionFactor
Ч
=