Great Plains NTA2007 Material Rate - Manual (Page 30)

28 Great Plains Manufacturing, Inc. Contents Appendix VRG Air Drills
167-085B Contents Appendix 2012-01-03
Dry Fertilizer Rate
ADC2350/B, NTA607/2007/HD and NTA907/3007/HD
systems meter dry granular fertilizer in the same fashion
as seed. This section of the manual includes a chart for a
representative material. Note: For liquid fertilizer rate, see page 30.
Note: Applying granular fertilizer with the optional Small
Seeds flute shaft installed is not recommended.
Reading Dry Fertilizer Rate Charts
1. Verify that the chart is for your star configuration
(flutes at each meter outlet). 2 stars is standard.
Higher rate charts, requiring optional flute star
shafts, begin on page 39. Optional kits are available
to increase to 3 or 4 stars. See “Changing Flute
Stars” on page 12.
2. Determine the Final Range gearing required.
See “Seed Meter Final Drive Range” on page 5
Note: The Range gearing may be different for the fertilizer
hopper and the seed hopper.
3. Note the reference Material Density
a
used to develop
the chart. Enter this on the seed monitor only if you
do not know your actual density.
4. Find your target fertilizer rate (which is pounds-per-
acre or kilograms-per-hectare).
5. Set the Variable Rate Gearbox control arm as
specified in the “Gearbox Setting” column.
Note: Charts begin at setting 20.
Settings below 20 are not recommended, other
than zero (0), which may be used to temporarily
shut off flow from that meter.
6. Enter the Calibration Constant (“Cal. Const.”) on the
seed monitor. See manual 167-085B-ENG for
Calibration Constants in pulses per litre.
Range Gears Stars Per Outlet Material De
e r t il / g k 6 9 . 0 2
17T Driven (standard) 60.0 pound
te e t a R l a i r e t a M Gearbox Cal. Gearbox
Higher fertilizer rates, requiring optional flut
Final Drive Range Gears Stars
2 e g n a R h g i H
54T Driving; 17T Driven
(stand
Material Rate Gea box C l
a. If your actual material density is significantly different, see “Density Adjustment” on page 38.
In general, Calibration automatically compensates for modest differences between actual and reference (chart) fertilizer densities.
Stars Per Outlet Material Density R
B e r t il / g k 6 9 . 0 2
(standard)
60.0 pounds per cubic foot S
l a i r e t a M e t a R l a i r e t a M Gearbox Cal
Material Rate e t a R l a i r e t a M
a h / g k c a / s b l a h / g k c a / s b l
0 0 0 - 106.8 119.7
18.0 20.2 20 81031 111.5 125.0
20.0 22.4 21 81160 116.3 130.4
22.1 24.8 22 81287 121.2 135.8
24.4 27.3 23 81412 126.1 141.4
26.7 30.0 24 81534 131.1 147.0
29 2 32 8 25 81654 136 2 152 6
Gearbox
Setting
Cal.
Const.*