Great Plains 1007NT Material Rate User Manual
Page 30
Great Plains Mfg., Inc.
28
150-290B
07/08/2009
5.
If not already done, set the Small Seeds rate handle.
If fertilizer is loaded, remove the fertilizer drive chain
or set the fertilizer rate adjuster to zero (unless you
are simultaneously calibrating fertilizer rate).
6.
Load seed above the rows to be sampled. Load well
more than the expected sample size.
7.
Rotate the crank several turns to ensure that the
drives and seed cups are engaged, working properly,
free from foreign material.
8.
Note the current reading of the acremeter, unless
you do not plan to rely on it for the calibration.
9.
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.
10. If not already done, set the Small Seeds Rate Han-
dle. If fertilizer is loaded, remove the fertilizer drive
chain (unless you are simultaneously calibrating fer-
tilizer rate).
11. Load seed above the rows to be sampled. Load well
more than the expected sample size.
12. Rotate the crank several turns to ensure that seed is
flowing steadily from the meters.
13. Note the current reading of the acremeter, unless
you do not plan to rely on it for the calibration.
14. Empty the sample containers back into the seed box,
and place them back under the three hoses to gather
metered seed.
15. Turn crank at a comfortable rate until one tenth acre
is tallied on acremeter, or you have reached the
crank rotation count. While turning, check that cups
have ample seed coming into them.
16. Weigh metered seed. Subtract initial weight of con-
tainer(s).
17. Divide the net seed weight by three. Multiply by num-
ber of openers on your drill, and by the sampling fac-
tor (10) to determine the total of pounds-per-acre
seeded.
For example: consulting the chart for Alfalfa at:
12 pounds per acre
the closest rate is:
12.1
which is an initial Seed Rate Handle scale setting of:
60
Crank rotations for one tenth acre:
49.2
Area Sampled
Wheel Revolutions
Full Acre
491.6
49.2
Full Hectare
1214.8
121.5
1/10
th
Acre
1/10
th
Hectare
For example: the containers weighed a total of 0.78
pounds after test.
NetWeight is:
0.22 lbs = 0.78 - 0.56
NetWeight
GrossWeight ContainerWeights
–
=
For example:
MeasuredRate is:
10.9 lbs/ac = 10
x 15 x 0.22
÷ 3
MeasuredRate
10
15
NetWeight
3
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