Great Plains YP4425A Material Rate - Manual (Page 15)

Great Plains Manufacturing, Inc. Table of Contents Rate Setting Overview 11
2014-05-13 Table of Contents 401-627B
Checking Planting Rate
Singulated seed charts are based on cleaned and sized
seed singulated with the recommended disk. Extreme
seed size variations and foreign material can affect the
planting rate.
Any material difference between chart and field rates
implies a mechanical malfunction, a planter setup error
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.
For metric sample runs, see page 64.
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.
For metric measures, use 1/1000th hectare.
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
Rate check data is from sheet “Check” in:
US Example:
Planter: YP4025A-2430
Crop: Soybeans
Density: 3000 seeds/lb
Seed Disk: 817-798C
Target Population:
123,000 seeds/acre
Metric Example:
Planter: YP4025A-2470
Crop: Soybeans
Density: 6600 seeds/kg
Seed Disk: 817-798C
Target Population:
305 000 seeds/hectare
Maximum Planting Speed:
5 mph
Maximum Planting Speed:
8.9 kph
Chart Seed Spacing:
1.7 inch
Chart Seed Spacing:
4.6 cm
Rows to Sample Length of Sample Run
Row Row 1/1000th 1/200th
Spacing* Count Acre Acre
7.5in Single 4 17ft 5in
8in Single 4 16ft 4in
9.5in Single 4 13ft 9in
10in Single 2 26ft 2in
15in Single 2 17ft 5in 87ft 1in
20in Single 1 26ft 2in 130ft 8in
22in Single 1 23ft 9in 118ft 10in
30in Single 1 17ft 5in 87ft 1in
36in Single 1 14ft 6in 72ft 7in
38in Single 1 13ft 9in 68ft 9in
40in Single 1 13ft 1in 65ft 4in
30in Twin 1 pair 17ft 5in 87ft 1in
36in Twin 1 pair 14ft 6in 72ft 7in
38in Twin 1 pair 13ft 9in 68ft 9in
40in Twin 1 pair 13ft 1in 65ft 4in
* Not all spacings may be offered on implements 31442
covered by this manual.