Great Plains 3PNG15 Material Rate - Manual (Page 19)

Great Plains Manufacturing, Inc. Native Grass Planting 17
12/01/2010 202-579B
14. Divide desired rate of pounds per acre by the pounds
per shaft revolution (this is the number obtained from
step 13). Find this number (or the closest number to
this) in the drive setting chart. This will give Drive
Type and Native Grass sprocket sizes.
15. Determine which Driving and Driven sprockets
and Drive Type are required for the native grass box.
The sprockets are stored on the left-hand side
of
the drill frame. The drive type is set by ground drive
sprockets (see page 3).
To change Native Grass sprockets, loosen the chain
idlers
and remove chain.
Replace with desired sprockets.
You may want to repeat the calibration procedure if your
results vary greatly from the seed rate chart.
Note: All native grass mixes will vary in weight, seed type,
and density, so this is why you must calibrate each
mix.
Note: It is necessary to calibrate seed mix before set-
ting seed rate.
16. When drilling, check the amount of seed you are
using by noting the acres drilled, amount of seed
added to drill, and the level of seed in the box. If you
suspect you are drilling more or less seed than
desired, and you have accurately calibrated the drill
to you seed, you may need to change your sprocket
arrangement to compensate for your field conditions.
Figure 16
Native Grass Drive
26294
3
4
2
1
DRIVING
DRIVEN
1 2
3
4