Soybean Replant:
- Expect a 50-60 percent yield reduction with an early July planted soybean crop compared to a normal planting date.
- Actual soybean yields may to be 15 to 25 bu/a when planted in early July.
- Consider early group I varieties for planting after July 1. Later maturing varieties will work also but will be more susceptible to an early frost event.
Summer Forage: The following are some forage/bedding crop/cover crop options where corn or soybean acres have been lost. Steve Barnhart has more info in this ICM News article.
Crop Dry Hay Yield, Ton/Acre
German millet, one cut 1-2
Japanese millet, multi-cut 1-3
Proso millet, multi-cut 1-3
Sudangrass, multi-cut 1-3
Sorghum-sudan hybrids 2-4
Grain bearing forage sorghum 8-10 (wet silage yield)
Corn 7-9 (wet silage yield)
Staging Soybean Development: Soybean staging is important for timing of herbicide and fungicide applications. This article has visual descriptions of soybean stages.
R1 stage = one open flower at any node on the main stem.
R2 stage = open flower at one of the two uppermost nodes on the main stem with a fully developed leaf.
Potato Leafhopper: Recent weather has limited development of leafhopper populations. However, leafhoppers can increase rapidly with typical summer weather. More info is available here.
Growing Degree Days (GDD): The following are GDDs from April 22 to June 30.
- NW crop reporting district - 996 (-3).
- NC crop reporting district - 929 (-46).
- WC crop reporting district - 996 (-10)
Dates:
Mid-season Crop Management Clinic - July 9, 2014 at the ISU FEEL lab near Boone. Pre-registration is required by July 2.
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