Lebanon Crop Management Video

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15 March 2016

Double Crop Soybean Population results

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.


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
Penn State Extension
Department of Plant Science
Penn State University
116 ASI Building
University Park, PA 16802

Phone: 814-863-1018
Email: gwr@psu.edu
Web: extension.psu.edu
 
Website: 
http://cornandsoybeans.psu.edu
*********************************************************

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