Great Plains 2020P Operator Manual - Manual (Page 128)

2010P and 2020P
118-740M 4/23/2010
126
Small Seeds Attachment
To set and calibrate the seeding rate on the op-
tional small seeds attachment, follow these
steps.
Set the seed-rate handle on the small seeds at-
tachment as indicated by the Small Seeds Rate
Chart.
Checking Volumetric Seeding Rate
The seed charts are based on cleaned seed and
11L x 15, rib implement tires. Factors including
foreign material, seed treatment, seed size,
seed weight, field conditions and tire pressure
will affect seeding rate. Set and check the seed-
ing rate, then readjust the rate as necessary.
1. Record the weight of an empty container
large enough to hold seed metered from
three cups for one acre.
2. Place several pounds of seed over three
seed cups on an outside end of the small
seeds box. Raise drill off ground.
3. Remove hose ends from the openers of the
three seed cups being measured.
4. Turn gauge wheel a few turns to fill cups
with seed and until seed drops to ground
from all three hoses.
5. Place a container under the three hoses to
gather seed as it is metered.
6. Using the chart on the next page, select
your row spacing and determine the correct
number of revolutions per acre. Turn drive
gauge wheel the selected revolutions for
your row spacing. Check in box to make
sure seed tubes have plenty of seed cover-
ing them.
7. Weigh measured seed. Subtract initial
weight of empty container. Divide by three
for the amount metered by each cup, then
multiply by the number of drill openers for
the pounds-per-acre seeding rate.
8. If seeding rate is different than desired:
• Check to be sure all three seed cups are
covered with seed.
• Adjust seed-rate handle accordingly.
9. When finished reconnect seed hoses to op-
ners.
Equations for calibrating volumetric seeding rate:
measured seed empty container –
3 (number of meters measured)
----------------------------------------------------------------------------------------- pounds per meter =
pounds per meter number of openers
×
pounds per acre =