Great Plains 1007NT Material Rate - Manual (Page 29)

Great Plains Mfg., Inc.
27
07/08/2009 150-290B
Small Seeds Rate
Setting Small Seeds Rate
Seeding rate from this optional attachment is controlled
entirely by the seed rate handle on the small seeds box.
No Drive Type or sprocket changes are required. Small
seeds rate is unaffected by main seed box, Native Grass
and fertilizer rate settings.
Refer to Figure 10
To set Small Seeds rate, loosen the wing nut
at the
handle. Move lever position to about 10 higher than
the intended rate, then back to that rate. Tighten nut.
Set the initial rate based on the chart in the Seed Rate
Manual.
Small Seeds Rate Calibration
Before completing these steps, review “Calibration
Overview” on page 2.
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 recom-
mends calibrating.
1. Estimate the sample sizes, based on 1 ⁄
10
th acre or
1 ⁄
10
th hectare (the “10” below). If using an altered row
spacing, or different number of containers, replace
the “15” and “3” in the equations.
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.
Refer to Figure 1 on page 2
3.
Remove the calibration crank handle from its storage
location. Move it to the left side of the main (left)
ground drive wheel.
4. Pull the small seed hoses off the top of three opener
seed tubes, at the top of the openers. Place the
hoses into each sample container.
Figure 10
Small Seeds Rate Handle
18511
1
2
1
2
Example: You want to apply Alfalfa at 12 pounds per
acre with your 1007NT-1575 drill.
RateSample
is:
1.2 lbs = 12 ÷ 10
Example: all 15 rows in use rows.
SamplePerRow
is:
0.080 lbs = 1.2 ÷ 15
Example: 3 rows are to be used in the sampling.
ExpectedSample
is:
0.24 lbs = 0.08 x 3
RateSample
FieldRate
10
---------------------------- =
SamplePerRow
RateSample
15 (or row count in use)
---------------------------------------------------------------- =
ExpectedSample SamplePerRow 3 (or rows sampled)
×
=
Example: Three containers each weighing 3 oz.
0.188 lbs = 3 oz (3 ÷ 16 lbs)
ContainersWeight is:
0.56 lbs = 3 x 0.188