Great Plains 1007NT Material Rate - Manual (Page 22)

Great Plains Mfg., Inc.
20
150-290B 07/08/2009
Native Grass Seed Rates
Setting Native Grass Seed Rate
The Series II Native Grass Box is for seeding fluffy,
native grass blends like Big Blue Stem, Indian Grass,
and Side Oats Grama.
Native Grass seed rate is controlled by a separate (right
side) drive system, and is completely independent of
rates for Main seed box or Small Seeds.
Refer to Figure 6
Native Grass mixes are too variable for seed rate tables
to be useful. Seeding rate for Native Grass is determined
by calibration, and set by:
• Drive Type handle (not shown) at the right ground
drive gearbox , and;
• Driven sprocket at the Native Grass jackshaft, using
a sprocket from the storage trees .
Great Plains recommends that you calibrate and adjust
your drill to help insure an accurate seeding rate. Fine
rate adjustment is done with the Driven sprocket.
Access to the ground drive wheel is easier if it is locked
up. See “Ground Drive Lock Up” in the drill Operator
Manual. Be sure to lower drive before planting.
Rate Reduction
At very low rates, it may be necessary to install the
Native Grass Rate Reduction kit (Figure 7), which
reduces all chart rates by 55%. The charts in this Seed
Rate manual are provided in standard and Rate Reduc-
tion versions.
The Rate Reduction kit is standard on the 10007NT drill,
and includes an installation manual. The kit exchanges
the following components.
• The standard 19T gearbox output sprocket is
replaced by a 12T.
• The standard 24T jackshaft output sprocket is
replaced by a 17T.
• Two chains are replaced to keep slack within idler
adjustment range.
Figure 6
Native Grass Rate Control
29004
1
2 4
3 5
1
2
3
Figure 7
Rate Reduction Kit
28377
4
5