GREAT PLAINS 3N-3010, Руководство оператора, Страница: 46 / 118

42Great Plains | | 4/22/19 Table of Contents Index Great Plains | 42
196-366m Table of Contents Index Adjustments
Checking Volumetric Seeding Rate
The seed charts are based on cleaned seed and 12.5 x
15, rib implement transport tires and 13 x 5.00 - 6 contact
drive wheel tires. Factors including foreign material, seed
treatment, seed size, seed weight, field conditions and
tire pressure will affect 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 from three seed cups for one
acre.
2. Place several pounds of seed over three seed cups
on an outside end of the drill box.
Refer to Figure 26
3. Turn contact drive wheel clockwise a few turns to fill
seed cups with seed and until seed drops to ground
from all three openers.
4. Place a container under the three openers to gather
seed as it is measured.
5. Turn contact drive wheel clockwise 420 revolutions.
Check to make sure seed cups have plenty of seed
covering them.
6. Weigh measured seed. Subtract initial weight of
empty container. Divide by three for the amount
measured by each cup, then multiply by the
number of drill openers for the pounds-per-acre
seeding rate.
7. If seeding rate is different than desired:
•
Double check drive range sprocket combinations.
•
Check for seed cup malfunction.
•
Check that all three rows are getting seed.
•
Adjust seed-rate handle accordingly.
•
Refer to “Troubleshooting,” page xlix.
19114
Figure 26
Equations for calibrating volumetric seeding rate:
measured seed empty container –
3 (number of cups measured)
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pounds per cup =
pounds per cup number of openers

pounds per acre =