Material Rate User Manual

411-020B Table of Contents 2014-03-17
2 1625AHD/AHL Table of Contents Great Plains Manufacturing, Inc.
Seed Rate Overview
The information in this section covers important setup
and checking information that applies to the Air-Pro
®
meter and 1625AHD and 1625AHL ground drive system.
Seed Rate Setting Summary
1. For your crop, determine your intended population, in
seeds/acre or seeds/hectare. If you know only the
seed spacing or population in pounds/acre, consult
the charts on page 2 through page 4.
2. For your crop, population and desired field speed,
select the correct seed disk:
“Air-Pro
®
Meter Disk Selection (USc)” on page 8
3. Set meter rate. See instructions for each monitoring
mode (page 22 or 61).
4. For staggered twin row, time row pairs using:
“Sprocket Indexing (Stagger)” on page 66
5. Set initial seed inlet shutter per seed rate chart.
Set initial meter pressurization per page 13, 18.
6. Configure the DICKEY-john
®
PM400 seed monitor
for the crop (covered separately for each planting
mode).
7. Verify your planting rate per the instructions at:
“Checking Planting Rate” on page 19. If the results
are consistent with your setup, plant the crop.
Population Reference Information
Seeds per Unit
If only population weight (pounds/acre or
kilograms/hectare) is known, obtain the population count
by multiplying the population weight by the
“Kernels per pound” or “Kernels per kg” value from the
seed container.
Seed Spacing
If only seed spacing is known, use the tables on the next
two pages to determine population.
Note: Tables may show row spacings not presently
available on model 1625AHD and 1625AHL.
Kernels Per Pound
Figure 2
Air-Pro
®
Seed Meter
29626
Example: Milo
Target rate: 4.5 pounds/acre
Seed density: 14500 seeds/pound
Population: = Rate × Density
= 4.5 × 14500, or:
65250 seeds/acre
80,000 Seed Kernels 80,000 Seed Kernels
Bag Weight per Pound Bag Weight per Pound
67.5 lbs 1,185 45.0 lbs 1,778
65.0 lbs 1,231 42.5 lbs 1,882
62.5 lbs 1,280 40.0 lbs 2,000
60.0 lbs 1,333 37.5 lbs 2,133
57.5 lbs 1,391 35.0 lbs 2,286
55.0 lbs 1,455 32.5 lbs 2,462
52.5 lbs 1,524 30.0 lbs 2,667
50.0 lbs 1,600 27.5 lbs 2,909
47.5 lbs 1,684 25.0 lbs 3,200
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