Great Plains YP1625 Operator Manual - Manual (Page 42)

1625
401-182M 7/12/2005
40
Checking Singulated Seeding Rate
The seed charts are based on cleaned and sized
seed. Extreme seed size variations, foreign mate-
rial and tire pressure will affect the seeding rate.
Check the seed population rate as described
below.
1. Adjust the planting depth to a shallow setting.
2. Plant at the desired planting speed for a short
distance.
3. Using the table on the right, determine how
many rows need to be counted.
4. Measure a distance of 17’ 5” in the planted ar-
ea. If 20-inch row spacing is being used, mea-
sure a distance of 26’ 2” in the planted area.
5. Count the number of seeds, in the appropri-
ate number of rows, over the distance mea-
sured.
6. Multiply the number of seeds counted by
1,000. This is the plant population in seeds
per acre.
Example 1:
If you have twin tows on 30” spacing count both of
the twin rows. If you have a 15-inch row spacing,
plant according to Table 1, two rows must be
counted. Measure 17’ 5” and count the number of
seeds in two rows. If the number is, for example,
180, multiply 180 by 1,000.
180 x 1,000 = 180,000 seeds per acre.
7. If the planting population is significantly differ-
ent than desired, make the following checks:
• Double check the transmission and range
sprocket combinations. Refer to the seed
population chart for the seed being planted.
• Check the air pressure in the gauge wheel
tire. Refer to “Tire Inflation Chart” on page 97.
• Refer to Troubleshooting on page 54.
Seed rate charts
Seed rate charts begin on page 100. The charts
give transmission sprocket combination and drive
range sprockets for row spacing used, to achieve
the population or pounds per acre desired. The
charts also give seed spacing for singulated seed
and maximum planting speed for both singulated
and volumetric seeds.
Each seed chart has a corresponding page show-
ing the different drive ranges for that seed and a
transmission sprocket reference.
Planted row
spacing
(inches)
Number of
rows to count
Length of row
to measure
15 2 17’ 5”
20 1 26’ 2”
30 1 17’ 5”
30 Twin Row 2 (1 pair of twins) 17’ 5”