Small seeds row shut-off – Great Plains 3P600 Material Rate User Manual
Page 37
Great Plains Manufacturing, Inc.
Small Seeds Rate
35
2011-10-21
118-794B
15. Divide the desired original field rate by the measured
rate to calculate a scale adjustment factor.
16. Multiply the scale setting just used times correction
factor to obtain the next scale setting to use.
17. Set the Small Seeds Rate Handle to the new scale
setting.
18. You may want to repeat calibration procedure at the
new setting if your results varied greatly from the
Seed Rate Chart, or if you must operate near the
ends of the Seed Rate handle scale (0-20 or
90-100).
19. Check that your tire(s) is (are) properly inflated. See
“Tire Inflation Chart” in Operator manual.
20. With calibration complete, store calibration crank,
re-engage hub if locked-out, reinstall any removed
chains or sprockets, reconnect seed hoses and re-
install acremeter (if removed - tighten only to snug).
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 rate
slightly to compensate for field conditions.
Small Seeds Row Shut-Off
If alternate row spacing is required for small seeds,
optional plugs are available to block flow inside the seed
box tray.
1.
Clean-out seed. The seed box must be empty prior
to inserting plugs. See “Small Seeds Box
Clean-Out” in Operator manual.
2.
Before installing plugs, inspect the seed boxes for
existing factory-installed plugs. These are blocking
extra unused seed ports. You may want to identify
these plugs with an indelible marker.
3.
Insert one plug at each row to shut off. Verify the
seed hose path before inserting the plug, as some
hoses do not make a strictly vertical drop to their row
units.
4.
Review seed rate settings prior to planting. Perform
calibration calculations with the actual active row
count.
When removing plugs to restore rows to operation, be
sure to not disturb a factory-installed plug.
Example: the target rate was 12 lbs/ac:
the correction factor =1.2
0.94
˙
12
12.8
-----------
=
CorrectionFactor
FieldRate
MeasuredRate
---------------------------------------
=
Example: the previous scale setting was 60,
the next scale setting is 56
56
60
0.94
×
=
NextScale
PreviousScale
CorrectionFactor
×
=
Figure 10
Small Seeds Tube Plug
27407