Del Voight- Penn State Extension
Here with are the results from an initial ongoing trial looking at the relative impact of planting rate performance under a double crop soybean scenario. Plantings varied from 140,000 up to 230,000 ppa there appears to be a response between 140 and 170,000ppa but not between 170 and 230ppa. As we move into conducting more trials this coming season the goal is the increase the profitability of double crop soybeans.
Here with are the results from an initial ongoing trial looking at the relative impact of planting rate performance under a double crop soybean scenario. Plantings varied from 140,000 up to 230,000 ppa there appears to be a response between 140 and 170,000ppa but not between 170 and 230ppa. As we move into conducting more trials this coming season the goal is the increase the profitability of double crop soybeans.
|
Double Crop Soybeans Seeding Rate by Variety, 2015
|
|||||||||
|
Seeding Rate
|
Maturity Group
|
Yield,
bu/A |
Height (in)
|
Lodging (0 – 5, 0 = Best)
|
Test Weight
|
Final Stand
|
% Protein
|
% Oil
|
Seeds per lb
|
|
140,000
|
AG3735
|
37.2
|
22
|
0
|
56.5
|
167,283
|
37.2
|
16.0
|
3,682
|
|
140,000
|
TA 3759
|
40.2
|
24
|
0
|
56.1
|
184,985
|
38.2
|
15.7
|
3,296
|
|
140,000
|
Mycogen 388NR2
|
39.0
|
23
|
0
|
56.4
|
146,926
|
37.1
|
15.3
|
3,685
|
|
Mean
|
38.8
|
23
|
0
|
56.3
|
166,398
|
37.5
|
15.7
|
3,554
|
|
|
170,000
|
AG3735
|
42.5
|
25
|
0
|
56.1
|
180,560
|
37.5
|
16.0
|
3,369
|
|
170,000
|
TA 3759
|
47.3
|
25
|
0
|
56.0
|
197,376
|
38.2
|
15.5
|
3,389
|
|
170,000
|
Mycogen 388NR2
|
40.0
|
27
|
0
|
55.3
|
185,870
|
37.0
|
15.9
|
3,426
|
|
Mean
|
43.3
|
26
|
0
|
55.8
|
187,935
|
37.6
|
15.8
|
3,395
|
|
|
200,000
|
AG3735
|
48.4
|
25
|
0
|
56.1
|
245,172
|
36.7
|
16.9
|
2,996
|
|
200,000
|
TA 3759
|
47.7
|
26
|
0
|
55.5
|
198,262
|
38.2
|
15.5
|
3,582
|
|
200,000
|
Mycogen 388NR2
|
40.3
|
26
|
0
|
55.7
|
183,215
|
37.1
|
15.5
|
3,381
|
|
Mean
|
45.5
|
26
|
0
|
55.8
|
208,883
|
37.3
|
16.0
|
3,320
|
|
|
230,000
|
AG3735
|
43.8
|
24
|
0
|
55.9
|
238,091
|
36.9
|
16.4
|
3,128
|
|
230,000
|
TA 3759
|
51.7
|
25
|
0
|
56.3
|
270,839
|
38.6
|
15.4
|
3,435
|
|
230,000
|
Mycogen 388NR2
|
50.8
|
29
|
1
|
55.6
|
229,240
|
38.0
|
15.1
|
3,401
|
|
Mean
|
48.8
|
26
|
0
|
55.9
|
246,057
|
37.8
|
15.6
|
3,321
|
|
|
Mean
|
44.1
|
25
|
0
|
55.90
|
202318.2
|
37.6
|
15.8
|
3,398
|
|
|
LSD Seeding Rate (.05)
|
4.9
|
–
|
|||||||
|
LSD Variety (.05)
|
NS (p-value = .1013)
|
–
|
|||||||
|
LSD Interaction (.05)
|
NS (p-value = .2665)
|
35,706
|
|||||||
|
LSD Seeding Rate (.25)
|
2.8
|
–
|
|||||||
|
LSD Variety (.25)
|
2.5
|
–
|
|||||||
|
LSD Interaction (.25)
|
NS (p-value = .2665)
|
20,715
|
|||||||
|
CV %
|
16.6
|
15.3
|
|||||||
*********************************************************
Greg W. Roth
Professor of Agronomy
Greg W. Roth
Professor of Agronomy
Penn State Extension
Department of Plant Science
Department of Plant Science
Penn State University
116 ASI Building
University Park, PA 16802
116 ASI Building
University Park, PA 16802
Phone: 814-863-1018
Web: extension.psu.edu
