Great Plains 1007NT Material Rate - Manual (Page 36)

Great Plains Mfg., Inc.
34
150-290B 07/08/2009
Refer to Figure 1 on page 2
5.
Remove the calibration crank handle from storage
and attach to the main (left) ground drive wheel.
6. Pull the fertilizer hoses off the top of three opener
fertilizer tubes, at the top of the openers. Place the
hoses into each sample container.
7. If not already done, make any density correction,
then using the chart for the target rate, set rate
adjuster. If seed is loaded, remove the drive chain for
the active seed box (unless you are simultaneously
calibrating seed rate).
8. Load fertilizer above the rows to be sampled. Load
well more than the expected sample size.
9. Rotate the crank several turns to ensure that the
drive and meters are engaged, working properly, free
from foreign material.
10. Note the current reading of the acremeter, unless
you do not plan to rely on it for the calibration.
11. Empty the sample containers back into the fertilizer
box, and place them back under the three hoses to
gather metered material.
12. 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.
13. Weigh metered material. Subtract initial weight of
container(s).
14. Divide the net material weight by three (3). Multiply
by number of rows (15) and the sample factor (10) to
determine the total of pounds-per-acre applied.
15. If the measured rate is within a few percent of the
desired field rate, no further adjustment is neces-
sary. Skip to step 18.
!
CAUTION
Follow material supplier recommendations for
safety precautions in handling fertilizer.
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: at test conclusion, the three containers
weighed a total of:
3.40 lbs.
NetWeight is:
1.90 lbs = 3.40 - 1.5
NetWeight GrossWeight ContainersWeight – =
For example:
Measured Rate is:
95 lbs/ac = 10 x 15 x 1.9 ÷ 3
This is below the desired field rate of 109.
MeasuredRate
NetWeight
3
--------------------------- 15 Ч 10 Ч =