Great Plains 1007NT Material Rate - Manual (Page 27)

07/08/2009 150-290B
Great Plains Mfg., Inc.
25
Seeding Brome Grass with Native Grass Box
The calibration for seeding Brome Grass differs from the
native Grass Mix calibration. The chart provides an initial
(pre-calibration) value in pounds per acre.
To adjust seeding rate:
1. Find the desired pounds per acre on the Brome
Grass Rate Chart (page 26).
2. Install the suggested Driven sprocket (page 22).
3. Move gearbox selector handle to desired drive type
(page 20).
Checking Seed Rate
4. Record weight of one or more empty containers
large enough to hold seed metered for one acre from
three rows.
5. Fill three or more compartments at least half full of
seed at the outboard end of the box. Pull seed tubes
off the openers under the compartments.
6. To calibrate, use the calibration crank at the Native
Grass ground drive.
7. Turn crank several times to fill seed cups with seed.
Continue to turn wheel or calibration crank until seed
falls to the ground from each cup.
8. Place empty container(s) under the three seed tubes
to gather seed as it is metered.
9. Rotate crank or ground drive wheel for one acre.
(see table at right)
10. Check that the three seed cups have plenty of seed
coming into them.
11. Weight metered seed. Subtract initial weight of con-
tainer.
12. Divide by three to obtain the per-row rate.
13. Multiply by the number of openers on the drill (15) to
determine total pounds seeded per acre.
Example FieldRate:
You desire to plant at 13.2 pounds per acre.
Per the chart, this is an initial setting of:
Standard Rate
Drive Type: 2
Driven Sprocket: 20T
Example:
Three sample containers each weigh 8 oz.
ContainersWeight:
1.5 lbs = 3 x 0.5 lb
.
Area Sampled Wheel Revolutions
Full Acre 491.6
49.2
Full Hectare 1214.8
121.5
1/10 th Acre
1/10 th Hectare
Example:
Gross weight of containers and seed was 1.9 lb.
NetWeight:
0.4 lbs = 1.9 - 1.5
NetWeight GrossWeight ContainersWeight – =
Example:
PoundsPerSeedCup:
1.33 lb = 10 x 0.4
÷ 3
PoundsPerSeedCup 10
NetWeight
3
------------------------- ×
=
Example:
SampleRate:
20.0 lb = 1.33 x 15
SampleRate PoundsPerSeedCup 15
Ч
=