Great-plains YP1220 Operator Manual User Manual download pdf (Page 44)

40 YP1220 Great Plains Manufacturing, Inc.

401-506M 03/14/2012

Checking Singulated 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 pres-

sure can materially affect planting rate.

Checking the rate also provides a double-check on your

population calculations and drive conﬁguration.

Checking Singulated Rate

1. Adjust the planting depth to shallow on 3 rows units.

Using center and wing-end row units for measure-

ment provides a more accurate assessment of over-

all planter performance. Pick center units outside

wheel tracks.

2. Use bungees or wire to tie-up the press wheel

assembly on the tested row units, so that the seed is

not covered.

3. Operate the planter for 17 feet 5in, plus several feet

for the press wheels to clear the end of the sample

distance.

4. Count the number of seeds in the test rows.

5. Multiply the total by 1000 to obtain an acre value.

6. If the populated is substantially different than

expected, check tire inﬂation, and on a ground-drive

planter, double-check the sprocket conﬁguration.

See “Troubleshooting” on page 50.

Seed Rate Check Example

Seed: Soybeans

Seed wheel: 100 cell

Target population: 140,000 seeds/ac

Sample: 3 rows

Operate for 25 ft.

Count seeds in a 17ft5in section of the test run.

A total of 141 seeds is counted in all 3 rows.

141,000 = 141 x 1000

The result is only 0.1 percent higher than the target

population. This is within expected sampling error, and

requires no adjustment.

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Great-plains YP1220 Operator Manual User Manual Page 44