Great Plains PD8070 Operator Manual - Manual (Page 36)

32 PD8070 Table of Contents Index Great Plains Manufacturing, Inc.
401-479M Table of Contents Index 2014-07-23
Checking Planting Population
After setting transmission, always field check planting
population.
1. Select one row unit for testing. Release spring
pressure on closing wheels or disks.
2. Tie up closing disks or wheels to hopper support
using a chain or heavy wire.
3. Disengage clutches on remaining row units.
4. Adjust planting depth to a shallow setting.
5. Plant at a normal speed for a short distance. For the
standard 70 cm row spacing, measure 14.29 m
(one thousandth of a hectare).
6. Count the number of seeds in one row over the
measured distance. Multiply the number of seeds
counted by 1000. This is the total population.
If planting population is significantly different than
desired, make the following checks:
• Double check sprocket combination in transmission.
See “Finger Meter Rate Chart” on page 36.
• Check air pressure in gauge wheel tires. See “Tire
Inflation Chart” on page 97.
• Check for meter malfunction or excessive
contact-drive-wheel slippage. See “Troubleshooting”
on page 58.
Example:
Plant for 14.29 m
Example:
Seed count is:
24
Population is:
24 000
,
24 1000
×
= Population SeedCount
1000 Ч
=