Great Plains 1205NT Material Rate - Manual (Page 5)

Great Plains Mfg., Inc.
3
04/12/2007 150-131B
6. Turn drive gauge wheel or calibration crank sev-
eral times to fill seed cups with seed. Turn wheel
or crank until seed falls to the ground from each
cup.
7. Rotate drive gauge wheel 346 rotations. This is
equal to one acre.
Note: You can also rotate the gauge wheel jackshaft by
means of a wrench or socket. If rotating gauge
wheel jackshaft, disengage the lockout on the
drive wheel and use same number of rotations as
for rotating drive wheel.
8. Check that the three seed cups have plenty of
seed coming into them.
9. Weigh metered seed. Subtract initial weight of
container. Divide by three. Multiply by the number
of openers on your drill to determine total pounds
seeded per acre. If this figure is different than
desired, set your seed rate adjustment handle
accordingly.
Note: You may want to repeat the calibration procedure
if your results vary greatly from seed rate chart.
10. When drilling, check seeding rate by noting acres
drilled, amount of seed added to drill and seed
level in drill box. If you are seeding more or less
than desired, adjust seeding rate slightly to com-
pensate for field conditions.
Drill
Model
Revolutions for One
Acre Hectare
1205NT 346 855
.
MeasuredSeed EmptyContainer –
3
---------------------------------------------------------------------------------- PoundsPerSeedCup =
PoundsPerSeedCup NumberOfOpeners × PoundsPerAcre =