No surprise here related to early planting and its impact on yield. We need to explore the cost of drying to factor this into the economics of the system but it would appear the earlier plantings can benefited under the 2015 conditions. We are currently planting the second seeding date today at the research station this information will assist in management recommendations for double crop soybeans that might differ than our standard recommendations in the Penn State Agronomy guide.
|
Planting Date
|
Maturity Group
|
Yield,
bu/A |
Height (in)
|
Population
|
NDVI
|
% Protein
|
% Oil
|
Seeds per lb
|
|
7/7/2015
|
Early
|
37.0
|
24
|
175,285
|
0.71
|
37.5
|
15.5
|
3,677
|
|
7/7/2015
|
Middle
|
32.4
|
22
|
187,656
|
0.73
|
37.6
|
15.6
|
3,433
|
|
7/7/2015
|
Late
|
35.8
|
26
|
160,824
|
0.78
|
37.6
|
15.4
|
3,506
|
|
7/7/2015
|
Mean
|
35.1
|
24
|
174,588
|
0.74
|
37.6
|
15.5
|
3,539
|
|
7/16/2015
|
Early
|
26.8
|
18
|
173,195
|
0.66
|
36.7
|
15.4
|
3,772
|
|
7/16/2015
|
Middle
|
25.8
|
23
|
190,967
|
0.73
|
36.6
|
14.8
|
3,727
|
|
7/16/2015
|
Late
|
26.6
|
24
|
175,808
|
0.76
|
36.8
|
14.5
|
4,025
|
|
7/16/2015
|
Mean
|
26.4
|
21
|
179,990
|
0.72
|
36.7
|
14.9
|
3,841
|
|
7/22/2015
|
Early
|
23.4
|
21
|
181,210
|
0.78
|
36.3
|
15.3
|
4,039
|
|
7/22/2015
|
Middle
|
23.3
|
20
|
191,316
|
0.78
|
36.7
|
13.9
|
4,408
|
|
7/22/2015
|
Late
|
23.0
|
22
|
177,202
|
0.76
|
37.1
|
13.8
|
4,393
|
|
7/22/2015
|
Mean
|
23.2
|
21
|
183,242
|
0.77
|
36.7
|
14.3
|
4,280
|
|
Mean
|
28.2
|
22
|
179,274
|
0.74
|
37.0
|
14.9
|
3,886
|
|
|
LSD Planting Date (.05)
|
4.4
|
|||||||
|
LSD Maturity Group (.05)
|
NS (p-value = .53)
|
|||||||
|
LSD Interaction (.05)
|
NS (p-value = .83)
|
|||||||
|
LSD Planting Date (.25)
|
2.5
|
|||||||
|
LSD Maturity Group (.25)
|
NS (p-value = .53)
|
|||||||
|
LSD Interaction (.25)
|
NS (p-value = .83)
|
|||||||
|
CV % (Planting Date)
|
20.4
|
|||||||
|
CV % (Maturity Group)
|
23.3
|
|||||||
|
Prepared by: Austin Kirt, Greg Roth and Mark Antle Department of Plant Science
|
||||||||
*********************************************************
