Seed cup rate charts, Reading a seed cup rate chart – Great Plains 2525F Material Rate User Manual
Page 6
Great Plains Mfg., Inc.
4
118-232B
03/22/2007
Seed Cup Rate Charts
Seed cup planting rate is determined by:
• Crop and seed variant
• Drive Type sprockets
• Seed Cup sprocket engagement (Seed Rate
Handle)
The are no other adjustments.
The rates indicated in the charts are approximate val-
ues. To assure the most accurate seeding rate it is rec-
ommended that the drill be calibrated for the desired
seed at the time of planting.
Reading a Seed Cup Rate Chart
1.
Find the table for your seed;
for example:
Barley.
For some seeds, there may be multiple tables,
allowing a wider range of populations.
2.
Find the table row for your row spacing;
for example:
38in Twin Row.
3.
Find your target seed rate
(which is pounds per acre);
for example:
11 pounds per acre.
4.
The Drive Type is shown in the top row for that col-
umn. The Seed Rate Handle setting is shown in
the second row for that column;
in this example:
Drive Type: 2
Seed Rate Handle: 25
2
2
2
0
5
10
7.5in
0
7
13
8in
0
7
12
9.5in
0
6
10
15in, 30inTR
0
4
7
36inTR
0
2
4
38inTR
2
5
40inTR
3
5
Drive Type
Handle Setting
Seed:
Barley
(based on
51#/bu)
R
wS
pacin
g
9.5in
6
1
13 19 24 28 34
15in, 30inTR
0
4
7
9
12 15 18 22
36inTR
0
2
4
6
8
10 12 15
38inTR
0
2
5
6
9
11 13 15
40inTR
0
3
5
6
9
11 14 16
4
4
4
4
4
4
4
4
(based on
51#/bu)
RowSp
Dri e T pe
15in, 30inTR
0
4
7
9
12 15 18 22 25 29
36inTR
0
2
4
6
8
10 12 15 17 19
38inTR
0
2
5
6
9
11 13 15 17 20
40inTR
0
3
5
6
9
11 14 16 18 21
on
RowSp
2
2
2
2
2
2
2
0
5
10 15 20 25 30
7.5in
0
7
13 17 24 30 36
8in
0
7
12 16 23 28 34
9.5in
0
6
10 13 19 24 28
15in, 30inTR
0
4
7
9
12 15 18
36inTR
0
2
4
6
8
10 12
38inTR
0
2
5
6
9
11 13
40inTR
0
3
5
6
9
11 14
4
4
4
4
4
4
4
Drive Type
Handle Setting
Seed:
Barley
(based on
51#/bu)
R
owS
pacin
g
Drive Type