Checking singulated planting rate – Great Plains YP1625 Material Rate User Manual
Page 4
401-226B
8/8/2006
4
Checking Singulated Planting Rate
The seed charts are based on cleaned and sized
seed. Extreme seed size variations, foreign material
and tire pressure will affect the planting 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 below, determine how many
rows need to be counted.
4.
Measure a distance, according to the table, for
the row spacing in the planted area.
5.
Count the number of seeds, in the appropriate
number of rows, over the distance measured.
6.
Multiply the number of seeds counted by 200 if
measuring for 1/200 acre or 1,000 if measuring
for 1/1,000 acre. This is the plant population in
seeds per acre.
Example 1: Single Row
If you have a 10” row spacing planter, according to
the chart, three rows must be counted. Measure
17’5” and count the number of seeds in three rows.
If the number is, for example, 180, multiply 180 by
1,000.
180 X 1,000 = 180,000 seeds per acre.
Example 2: Twin Row
If you have a Twin Row 30” spacing planter, according
to the chart, both rows of the twin row must be count-
ed. Measure 87’1” and count the number of seeds in
the parallel row. If the number is, for example, 170,
multiply by 200.
170 X 200 = 34,000 seeds per acre
NOTE: Count Twin Row as one row.
7.
If the planting population is significantly different
than desired, make the following checks:
• Double check the transmission and range sprock-
et 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” in the operator’s
manual.
• Refer to Troubleshooting on in the operator’s
manual.
Seed rate charts
Seed rate charts begin on page 8. The charts give
transmission sprocket combination and drive range
sprockets for row spacing used, to achieve the popu-
lation or pounds per acre desired. The charts also give
seed spacing for singulated seed and maximum plant-
ing speed for both singulated and volumetric seeds.
Each seed chart has a corresponding page showing
the different drive ranges for that seed and a transmis-
sion sprocket reference.
Planted row spacing
(inches)
Number of
rows to count
Length of row
to measure
for 1/1,000
acre
Length of
row to
measure for
1/200 acre
7 1/2”
4
17’5”
9 1/2”
3
18’4”
10”
3
17’5”
15”
2
17’ 5”
87’1”
19”
2
13’9”
68’9”
20”
1
26’ 2”
130’8”
Twin Row 30” or 30”
1**
17’ 5”
87’1”
Twin Row 36” or 36”
1**
14’6”
72’7”
Twin Row 38” or 38”
1**
13’9”
68’9”
Twin Row 40” or 40”
1**
13’1”
65’4”
15” Skip Row or 17 1/7
2
15’3”
76’3”
** Count Twin Row as one row.
NOTE: Use 1/200 acre for populations less than 100,000 seeds/acre. Use 1/1,000 acre for populations
above 100,000 seeds/acre.