Great Plains 606NT Material Rate - Manual (Page 19)

2011-10-21 Table of Contents Main Box Rates 151-122B
Great Plains Manufacturing, Inc. Table of Contents Main Box Rates 17
Small Seeds Rate
Seeding rate from the optional Small Seeds Attachment
is controlled entirely by the seed rate handle on the small
seeds box. No sprocket changes are required, and small
seeds rate is unaffected by settings for main seed box
and optional Native Grass.
Refer to Figure 9
To set Small Seeds rate, loosen the wing nut
at the
handle. Move the lever until the indicator is about 10
higher than the intended setting, then return it to that
setting. Tighten nut.
Set the initial rate based on the charts starting on
page 21.
Small Seeds Rate Calibration
Differences will exist between the tested seed and field
conditions used to generate the Small Seeds Rate
Charts, and your seed and conditions. To accurately
achieve your target population, Great Plains
recommends calibrating.
Due to the large number of crank revolutions per acre
(913 or 995) and per hectare (2256 or 2458), a practical
calibration is a simulation of
1 ⁄
10
th
acre or
1 ⁄
10
th
hectare.
1. Estimate the sample sizes.
2. To perform this calibration, you need a scale that is
accurate near the aggregate sample size, and
three (3) light weight containers, each capable of
holding a row’s sample.
3. For a 3P605NT or 3P606NT drill, raise the drill so
the gauge wheel is out of ground contact.
For a 605NT or 606NT drill, disengage the lock-out
hub (see Operator manual), to permit independent
rotation of the main jackshaft. The drill may be raised
or lowered for calibration. Leave the lock-out hub
engaged if rotating the tire for calibration.
Figure 9
Small Seeds Rate Handle
32634
1
2
1
2
Crushing Hazard:
Install lift locks on a raised 605NT or 606NT drill.
Example: You want to apply alfalfa at 12 pounds per
acre with a 3P606NT drill. RateSample is:
Example: the drill has 9 rows.
SamplePerRow is:
Example: 3 rows are to be used in the sampling.
ExpectedSample is:
The expected sample weight is 0.4 lb.
Example: 3 containers each weighing 0.23 lb or:
0.70 lb total
1.2
12
10
------ =
0.133
1.2
9
-------- =
0.40 0.133 3 ×
=
RateSample
FieldRate
10
---------------------------- =
SamplePerRow
RateSample
RowCount
------------------------------------
=
ExpectedSample SamplePerRow SampledRows
Ч
=