Reading a seed rate chart – Great Plains 3P600 Material Rate User Manual
Page 6
4
3P500, 3P500V & 3P600
Great Plains Manufacturing, Inc.
118-794B
2011-10-21
Reading a Seed Rate Chart
1.
Find your seed. Charts are in alphabetical order by
common North American seed name. Scientific
names are provided. Charts covering more than one
seed may be out of order.
For Sudan, see Flax.
The example presumes you desire to plant:
Barley at 60 pounds per acre with a 7.5 in. drill.
There are multiple chart sections for some seeds,
and the rates may overlap. Use the chart where your
desired rate is closest to 50 on the Seed Rate Han-
dle scale.
In our example, that would be Barley Drive Type 2.
If your seed is not listed, find one with similar size,
shape and density. Density of the test seed used to
develop the chart appears under the right end of the
handle scale values.
2.
Note the Drive Type for the chart rate row chosen (at
left above rates). This number (1-4) is used to
determine the gearbox handle setting. See page 2.
In the example, this is
Drive Type 2
3.
Find your row spacing in the far left column.
4.
Locate your desired seed rate in the table row for
your row spacing.
In the example the rate closest to 60 is:
64
5.
Note the Seed Rate Handle setting required, at the
top of the column at that seed rate. This is the initial
value set on the Seed Rate Handle. See page 3.
In the example, start with a handle setting of:
50 (or interpolate to 47),
and calibrate. When a target rate falls halfway
between handle settings, you can adjust the handle
slightly to compensate, as in the example, but
calibration is apt to result in further adjustment
anyway.
ed Box, continued...
Barley (Hordeum vulgare)
S
d R t H
dl S tti
32811
Seed Rate Handle Se
5
10
15
20
25
30
35
40
45
50
55
e Type: 2
Seed Rate in Pounds Pe
2
16
22
28
35
43
52
61
71
80
90
0
13
18
23
29
36
43
51
58
66
74
0
13
17
22
28
35
42
49
56
64
72
32811
tting
60
65
70
75
80
85
90
95 100
r Acre
(based on 51 pounds/bushel)
45 158 171 183 195 206 216 225 232
20 131 142 152 162 171 179 186 192
32811
0
5
10
15
20
25
30
35
40
45
50
Drive Type: 2
Seed Rate in Poun
0
12
16
22
28
35
43
52
61
71
80
0
10
13
18
23
29
36
43
51
58
66
32811
6 in.
0
12
16
22
28
35
43
52
61
7.25 in
0
10
13
18
23
29
36
43
51
7.5 in
0
10
13
17
22
28
35
42
49
32811
22
28
35
43
52
61
71
80
90
99 108 1
8
23
29
36
43
51
58
66
74
82
89
7
22
28
35
42
49
56
64
72
79
86
32811
Seed Rate Handle Setting
15
20
25
30
35
40
45
50
55
60
65
2
Seed Rate in Pounds Per Acre
22
28
35
43
52
61
71
80
90
99 108
18
23
29
36
43
51
58
66
74
82
89
17
22
28
35
42
49
56
64
72
79
86
32811