Lebanon Crop Management Video

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01 July 2016

Double Crop Planting Date

 Del Voight- Penn State Extension
The results below represent the results of the 2015  initial test plots where we are looking a the impact of planting date on the yield and quality of double crop soybeans.  This video discusses the project and provides a view of the different planting dates  in the field.
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

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