Great Plains YP4025F-1670 Material Rate - Manual (Page 6)

4 YP30/4010HDP/20P/25 Contents Metric Rates Great Plains Manufacturing, Inc.
401-571B Contents Metric Rates 2014-03-13
Checking Planting Rate
Although your seed monitor will report useful full pass
results, cautious practice includes manually checking the
seed rate early in the first pass.
The seed charts are based on cleaned and sized seed.
Extreme seed variations, foreign material and tire
pressure can materially affect planting rate.
Checking the rate also provides a double-check on your
population calculations and drive configuration.
The procedure is different for singulated seeding (this
page) and volumetric seeding (page 26).
Seed Rate Check Sample Size
(U.S. customary units. See page 53 for metric.)
Checking Singulated Rate
1. Using the table above, determine the length and
number of rows to check. For twin-row operation, a
pair of row units counts as one row.
2. Adjust the planting depth to shallow on that number
of rows units. Using center and wing-end row units
for measurement provides a more accurate
assessment of overall planter performance. Pick
center units outside wheel tracks.
3. Use bungees or wire to tie-up the press wheel
assembly on the tested row units, so that the seed is
not covered. Tie up both in a pair for twin-row.
4. Operate the planter for the distance in the table, plus
a few feet or meters for the press wheels to clear the
end of the sample distance.
5. Count the number of seeds in the test rows.
6. Multiply the total number of seeds counted by 200 if
measuring for
1 ⁄
200
acre, or by 1000 if measuring for
1 ⁄
1000
acre. This is the plant population in seeds per
acre.
7. If the populated is substantially different than
expected, see “Troubleshooting” in the planter
Operator Manual.
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
Seed Rate Check Examples
20in spacing single-row planter:
Per the table, plant about 30 ft, measure 26ft 2in, and
count 1 row for
1 ⁄
1000
acre. 180 seeds are counted:
180 x 1000 = 180,000 seeds per acre
30in spacing twin-row planter:
Per the table, plant about 90ft, measure 87ft 1in and
count 2 double rows for
1 ⁄
200
acre. 170 seeds are
counted:
170 x 200 = 34,000 seeds per acre