Great Plains 3P1006NT Operator Manual - Manual (Page 32)

28 3P1006NT Table of Contents Index Great Plains Manufacturing, Inc.
151-144M Table of Contents Index 2011-12-20
Material Rates Overview
Details of seed and fertilizer rate setting are found in the
Adjustments section, and rely on data from the Seed
Rate Manual.
Rate setting controls are different for each box, but
independent for each box. Some boxes have more than
one control.
Basic rate settings are found in the Seed Rate Manual
(part number 151-144B, normally located in the
Manual-Pak™ enclosure at front center of drill).
All chart rates, for all boxes, are approximate.
Great Plains strongly recommends calibration of each
box to the material to be applied.
Seeding Depth Overview
Setting nominal planting depth, and achieving it
consistently, is affected by multiple adjustable drill
functions, which can interact. From greatest to least
effect they are:
Refer to Figure 17
Main Box
Dual Seed
Native Grass Small Seeds Fertilizer
Rate Range Seed Rate Reduction
Rate Handle Rate Knob Coarse Rate Drive Type Drive Type
Fine Rate Rate Handle Driver/Driven
Cup Adjustment Door Handle
Coulter Height (page 16)
The coulters prepare soil ahead of the openers, and
are typically set slightly deeper than the openers. The
openers thus only need to open the tilled shaft into a
V-shaped furrow. The openers cannot generally run
deeper than the coulters, and running them too close
to coulter depth may result in uneven seed depth.
Opener Depth (Press Wheel Height) (page 39)
Using the T-handle, in no-till conditions, opener depth
can be set near, and at any level above coulter depth.
In soft or conventionally tilled soil, the opener disc
depth is more independent of the coulters.
Row Unit Down Pressure (Spring) (page 37)
In most conditions, the factory spring setting is
sufficient to make a consistent furrow in the
coulter-prepared soil. In extremely heavy conditions,
with the coulters running at the desired depth, the
openers may be making a furrow of inconsistent
depth. Rather than increase the coulter depth, you
can increase opener down force at the row unit
springs.
Disc Blade Adjustments (as blades wear) (page 36)
As blades wear, the diameter of the discs, and their
contact gap, changes. Seeding depth will also change
(or become irregular), unless adjustments are made
to blade spacing and the T-handle setting. Generally,
the blades need to be replaced completely before
coulter height adjustments would be needed.
Never back up with openers in the ground. To do so may cause
damage or opener plugging.
Figure 17
06 Series Coulter & Row Unit
28368
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2
4
1
1
2
3
4