30” rows – Great Plains 3N-4025P Operator Manual User Manual
Page 118
3N-4010P, 3N-4015P, 3N-4020P and
3N-4025P
196-286M
4/23/2010
116
30” Row Spacing
For Round Corn optimum meter speed is 45 to 75 RPM
For Flat Corn optimum meter speed is 65 to 75 RPM ( Shaded Area)
Ground Speed
Calibration Number
995
High Range
Sprockets Combination
Seed
Population
(seeds/acre)
Seed
Spacing
(inches)
7 mph
6.5 mph
6 mph
5.5 mph
5 mph
4.5 mph
4 mph
3.5 mph
Motor
Driver
Mainshaft
Driven
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
Optimum
Meter
(rpm)
21T
17T
13,306
15.7
13,799
15.2
14,330
14.6
14,872
14.1
14,903
14.0
15,423
13.6
45
15,524
13.5
46
16,016
13.1
47
16,199
12.9
48
Not Recommended
16,657
12.6
49
46
17,351
12.1
51
47
18,003
11.6
53
49
45
18,105
11.5
53
50
46
18,670
11.2
55
51
47
18,786
11.1
55
51
47
19,388
10.8
57
53
49
45
19,481
10.7
57
53
49
45
19,568
10.7
58
54
49
45
19,609
10.7
58
54
50
45
20,163
10.4
59
55
51
47
20,231
10.3
60
55
51
47
20,293
10.3
60
56
51
47
20,351
10.3
60
56
51
47
21,003
10.0
62
57
53
49
21,040
9.9
62
58
53
49
21,074
9.9
62
58
53
49
21,105
9.9
62
58
53
49
21,134
9.9
62
58
53
49
21,916
9.5
65
60
55
51
46
22,728
9.2
67
62
57
53
48
22,759
9.2
67
62
57
53
48
22,793
9.2
67
62
58
53
48
22,830
9.2
67
62
58
53
48
22,869
9.1
67
63
58
53
48
23,602
8.9
70
65
60
55
50
45
23,670
8.8
70
65
60
55
50
45
23,743
8.8
70
65
60
55
50
45
23,822
8.8
70
65
60
55
50
45
24,495
8.5
72
67
62
57
52
46
24,546
8.5
72
67
62
57
52
46
24,656
8.5
73
67
62
57
52
47
24,775
8.4
73
68
63
57
52
47
25,569
8.2
75
70
65
59
54
48
25,728
8.1
70
65
60
54
49
26,530
7.9
73
67
61
56
50
45
26,681
7.8
73
67
62
56
51
45
27,684
7.6
70
64
58
52
47
28,837
7.3
73
67
61
55
49
29,652
7.1
75
69
62
56
50
29,991
7.0
69
63
57
50
30,941
6.8
72
65
59
52
46
31,144
6.7
72
66
59
52
46
32,230
6.5
75
68
61
54
47
32,298
6.5
75
68
61
54
48
33,519
6.2
Not Recommended
71
63
56
49
34,809
6.0
73
66
59
51
36,098
5.8
68
61
53
30” Rows
12 FINGER METER
Low Population