Great Plains 8030P G1022 Operator Manual - Manual (Page 18)

15
Section 3 Adjustments
5/2/07 60303P and 80303P Three-Point Planter 401-008M-A
Great Plains Mfg., Inc.
Granular Chemical Rates
The chemical-application rate is determined by:
• the size of the opening on the chemical meter and
• ground speed.
Application rates will also vary with chemical consistency,
air temperature and humidity. Because of the wide vari-
ability in application rates, field check the actual rate of ap-
plication for each meter.
!
WARNING!
Agricultural chemicals can be dangerous if not selected and
handled with care. Always read and follow directions supplied
by the chemical manufacturer.
To adjust the chemical rate:
1. Select a meter setting as a starting point.
• If the chemical manufacturer recommends ounces per
1000 linear row feet or pounds per acre for a given
band width and row spacing, use the recommended
meter setting as a starting point.
• If the chemical manufacturer recommends pounds
per acre for complete (broadcast) coverage, calculate
the pounds per acre for your band width and row area.
Refer to Conversion from Broadcast to Row Cover-
age, page 15.
• If the meter setting is not available from the chemical
manufacturer, use Granular Chemical Rate Charts
starting on page 16. The charts are approximate. Use
these charts as a starting point for setting the meter.
2. Turn meter knob until the display shows the correct
number. See Figure 3-3.
3. Fill the hoppers with chemical.
4. Attach a plastic bag to each chemical
diffuser.
5. Drive 500 feet at a normal planting speed.
6. Weigh the contents of the bag in ounces.
7. Multiply weight by 2.2 to determine the pounds
per acre.
8. If necessary, adjust the meter setting and repeat
steps.
IMPORTANT: If the metering rate differs significantly
between rows, recalibrate the meters. Refer to
Recalibrating Chemical Meter, page 19.
Figure 3-3
Meter Knob
Conversion from Broadcast to Row Coverage
If the chemical manufacturer recommends pounds per
acre for complete (broadcast) coverage, reduce the
pounds per acre rate to match for your band width and row
area. Use the following formula to find the pounds per acre
for your band width and row spacing.
A X B/C = Pounds per Acre Application Rate
Where:
A = Recommended rate in pounds per acre for complete
(broadcast) coverage
B = Band width in inches
C = Row spacing in inches
NOTE: Measure the actual band width applied in your con-
ditions and use this width in your calculations.
17929
Example
The chemical manufacturer recommends 20 pounds
per acre for complete broadcast coverage. The band
width is 14 inches. The row spacing is 30 inches.
A = 20
B = 14
C = 30
20 x 14/30 = 9.3 pounds per acre
Turn meter knob to setting recommended for 9.3
pounds per acre.