Great Plains 3PNG15 Material Rate - Manual (Page 23)

Great Plains Manufacturing, Inc. Native Grass Planting 21
12/01/2010 202-579B
8. Weight metered seed. Subtract initial weight of con-
tainer. Divide by three.
9. Multiply by the number of openers on the drill to
determine total pounds seeded per acre. If this figure
is different than desired, change your sprockets and
drive type accordingly.
Note: You may want to repeat the calibration proce-
dure if your results vary greatly from seed rate
chart.
IMPORTANT !
The attached chart is to be used as a reference to
your own brome grass mix. All brome grass mixes
will vary so this is why you must calibrate each mix
using our chart only as a starting point.
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 your seed, you may need
to change your sprocket arrangement to compensate for
your field conditions.
Factors which will affect seeding rates are: weight of
seed, size of seed, relative humidity and moisture con-
tent of seed, ratio of inert material to seed, different pro-
portions of seed types affecting density, tire
configuration, tire pressure, and tire slippage.
All seed mixes will vary.
Note: These settings are based on 9.5L-15 tires inflated
to factory specifications.
MeasuredSeed EmptyContainer –
3
-------------------------------------------------------------------------------------------- PoundsPerSeedCup =
undsPerSeedCup NumberOfOpeners
×
PoundsPerAc =
Total Row Units
Model Spacing Rows
3PNG12-1410 10 inch 14
3PNG12-1975 7.5 inch 19
3PNG15-1810 10 inch 18
3PNG15-2475 7.5 inch 24