Great Plains 2025P Operator Manual - Manual (Page 52)

2025P, 2020P Bedded, and
2010HDP
118-928M 8/14/2006
50
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 af-
fect seeding rate. Set and check the seeding rate,
then readjust the rate as necessary.
1. Record the weight of an empty container
large enough to hold seed metered from three
meters for one acre.
2. Place several pounds of seed over three seed
meters on an outside end of the drill box.
NOTE: If drill box is full, shut off sliding seed tubes
to all but three meters on an outside end.
3. Raise drill off ground.
4. Turn gauge wheel a few turns to fill meters
with seed and until seed drops to ground from
all three openers.
5. Place a container under the three openers to
gather seed as it is metered.
6. Using the chart on the next page, select your
row spacing and determine the correct num-
ber 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 covering them.
7. Weigh measured seed. Subtract initial weight
of empty container. Divide by three for the
amount metered by each meter, then multiply
by the number of drill openers for the pounds-
per-acre seeding rate.
8. If seeding rate is different than desired:
• Double check transmission sprocket and
drive range sprocket combinations.
• Check for meter malfunction.
• Check for correct seed meter wheel.
• Check that all three rows are getting seed.
• Refer to “Troubleshooting” on page 59.
9. Readjust transmission and/or range sprock-
ets and repeat test.
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 =