Great Plains 1625AHL Material Rate - Manual (Page 23)

Great Plains Manufacturing, Inc. Table of Contents Seed Rate Overview 19
2014-03-17 Table of Contents 411-020B
Checking Planting Rate
Singulated seed charts are based on cleaned and sized
seed singulated with the recommended disk. Extreme
seed size variations, foreign material, tire pressure and
soil conditions can affect the planting rate.
Any material difference between chart and field rates
implies a mechanical malfunction, a planter setup error,
unsuitable planting conditions (such as excessive tire
slippage) or extremely worn planter components. You
can verify your setup and planter performance by
measuring seed placement and spacing over a relatively
short distance.
The columns to the right provide example data for a rate
check, in U.S. customary units and a similar example
metric units.
Checking Singulated Rates
1. Determine the sample distance to check. Find your
row spacing in the table below (U.S. customary
units) or at right lower (metric units).
2. Note the number of rows to sample. Adjust the
planting depth to a shallow setting on one or two
outside rows (per table). Tie up the press wheel
arms with wire or bungee to prevent furrow closure.
3. Load seed only in rows to be tested, or close seed
inlet shutters in other rows if seed is already loaded.
4. For populations above 100 000 seeds/acre, use a
sample size of 1/1000th acre.
For populations below 100 000 seeds/acre, use a
sample size of 1/200th acre.
5. Configure the planter for the chart rate using the
chart settings for sprockets.
Figure 6
Furrow Check
29247
USc Example:
Planter: 1625AHD and
1625AHL-1630
Crop: Soybeans
Density: 3000 seeds/lb
Seed Disk: 817-798C
Target Population:
123,000 seeds/acre
Metric Example:
Planter: 1625AHD and
1625AHL-1630
Crop: Soybeans
Density: 6614 seeds/kg
Seed Disk: 817-798C
Target Population:
438 000 seeds/hectare
Range Sprockets:
DRIVER: 30
DRIVEN: 30
Transmission Sprockets:
DRIVER: 19
DRIVEN: 24 Range Sprockets:
DRIVER: 30
DRIVEN: 30
Transmission Sprockets:
DRIVER: 28
DRIVEN: 26
Maximum Planting Speed:
5 mph
Maximum Planting Speed:
5 kph
Chart Seed Spacing:
1.7 inches
Chart Seed Spacing:
3.2 cm
Rows to Sample Row Length of Sample Run
Row Spacing* Count 1/1000th Hectare
76.2 cm (30in Single) 1 13.12 m
91.4 cm (36in Single) 1 10.94 m
96.5 cm (38in Single) 1 10.36 m
101.6 cm (40in Single) 1 9.84 m
76.2 cm (30in Twin) 1 pair 6.56 m
91.4 cm (36in Twin) 1 pair 5.47 m
96.5 cm (38in Twin) 1 pair 5.18 m
101.6 cm (40in Twin) 1 pair 4.92 m
36104B
Rows to Sample Length of Sample Run
Row Row 1/1000th 1/200th
Spacing* Count Acre Acre
30 in. Single 1 17 ft. 5 in. 87 ft. 1 in.
36 in. Single 1 14 ft. 6 in. 72 ft. 7 in.
38 in. Single 1 13 ft. 9 in. 68 ft. 9 in.
40 in. Single 1 13 ft. 1 in. 65 ft. 4 in.
30 in. Twin 1 pair 17 ft. 5 in. 87 ft. 1 in.
36 in. Twin 1 pair 14 ft. 6 in. 72 ft. 7 in.
38 in. Twin 1 pair 13 ft. 9 in. 68 ft. 9 in.
40 in. Twin 1 pair 13 ft. 1 in. 65 ft. 4 in.
36104A