Great Plains 2515P Material Rate - Manual (Page 4)

173-208B 12/1/2009
Great Plains Mfg., Inc. 4
Checking Seeding Rate
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 Table 1, determine how many rows
need to be counted.
4. Measure a distance of 17’ 5” in the planted ar-
ea.
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 a 15-inch row spacing bean machine,
according to the table, two rows must be counted.
Measure 17’ 5” and count the number of seeds in
two rows. If the number is, for example, 180, mul-
tiply 180 by 1,000.
180 x 1,000 = 180,000 seeds per acre.
Example 2:
If you have a 15-inch row spacing bean machine,
but desire to plant soybeans on 30-inch row spac-
ing, according to the table, one row must be
counted. Measure 17’ 5” and count the number of
seeds in one row. 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
tires. Refer to “Tire Inflation Chart” in the op-
erator’s manual.
• Refer to the troubleshooting guide in the
operator’s manual.
Planted row
spacing
(inches)
Number of
rows to count
Length of row
to measure
15 2 17’ 5”
30 1 17’ 5”
Table 1