Checking planting rate, Checking singulated rates – Great Plains YP825AR Material Rate User Manual
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YP825AR
Great Plains Manufacturing, Inc.
401-923B
2013-11-11
Checking Planting Rate
Singulated seed charts are based on cleaned and sized
seed singulated with the recommended disk. Extreme
seed size variations, foreign material and, on ground
driver planters, tire pressure 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 at right (metric chart is on
page 90).
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.
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.
4.
Configure the planter for the chart rate, either using
the chart settings for sprockets, or, with hydraulic
drive, selecting the rate on the seed monitor.
Figure 3
Furrow Check
29247
USc Example:
Planter: YP825AR-0830
Crop: Soybeans
Density: 3000 seeds/lb
Seed Disk: 403-551D
Target Population:
150,000 seeds/acre
Metric Example:
Planter: YP825AR-0830
Crop: Soybeans
Density: 6614 seeds/kg
Seed Disk: 403-551D
Target Population:
370 657 seeds/hectare
Range Sprockets:
DRIVING: 25
DRIVEN: 15
Transmission Sprockets:
DRIVING: 17
DRIVEN: 23
Range Sprockets:
DRIVER: 25
DRIVEN: 15
Transmission Sprockets:
DRIVER: 17
DRIVEN: 23
Maximum Planting Speed:
8 mph
Maximum Planting Speed:
12.8 kph
Chart Seed Spacing:
1.4 in
Chart Seed Spacing:
3.6 cm
Rows to Sample
Length of Sample Run
Row
Row
1/1000th
1/200th
Spacing
Count
Acre
Acre
Single Rows
22 in. (56 cm)
1
23 ft. 9 in.
27.6 in. (70 cm)
1
18 ft. 12 in.
29.5 in. (75 cm)
1
17 ft. 8 in.
30 in. (76.2 cm)
1
17 ft. 5 in.
87 ft. 1 in.
Twin Rows
29.5 in. (75 cm)
1 pair
17 ft. 8 in.
88 ft. 6 in.
30 in. (76.2 cm)
1 pair
17 ft. 5 in.
87 ft. 1 in.