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| Ohio State Corn newletter this week had a piece about 15 in wheat. A while back someone posted a question on this matter. Here is the info from the weekly newsletter
Wheat Varieties Suitable for 15-inch Rows and for Relay Intercropping -
Jim Beuerlein, Rich Minyo
Some Ohio wheat producers are interested in producing soft red winter wheat
in 15-inch rows which allows them to remove a grain drill from their
machinery inventory and because production in wide rows reduces their seed
cost by half. Other producers are interested in wide rows for the purpose
of relay intercropping soybeans. We have evaluated wheat varieties in
15-inch rows for several years and have learned that some varieties will
produce about as much yield in 15-inch rows as in narrow rows. For example,
in 2001 six of 23 varieties produced a yield between 99 percent and 105
percent of the yield in 7.5-inch rows. That capability is due primarily to
their growth habit, i.e. plant height and erectness of growth. Varieties
with medium height and a very erect growth habit are needed for relay
cropping and tall varieties with a non-erect growth habit perform well in
15-inch rows where intercropping is not planned.
We evaluated 55 varieties that were entered in the 2006 Ohio Wheat
Performance Trial for height and growth habit and developed two lists; one
list is of varieties that appear to be ideally suited for relay
intercropping, and the second is for varieties that seem to be ideally
suited for 15-inch row production. Height measurements and growth habit
ratings were made on each of the 55 varieties at each of five test sites
and the data combined so we could select the appropriate varieties for each
list. As seen in the following tables, only seven of the 55 varieties were
found to be suitable for relay intercropping and another 14 were found to
be suitable for wide-row production. For wide-row production, wheat should
be planted as soon as possible after the fly safe date, and the most
profitable seeding rate is 20-25 seeds per foot of row. An application of
30 pounds of Nitrogen should be made at planting.
Table 1: Wheat varieties suitable for wide -row production
Brand Variety
Public Certified Freedom
Public Certified Truman
Seed Consultants SC 1343
Ebberts 518
Steyer McLane
Pioneer Brand 25R63
Public Certified Cecil
Seed Consultants SC 1337
Steyer Wise
Public Certified Bess
Vigoro V9512
AgriPro COKER Coker 9553
Wellman W 131
Beck 122
Table 2: Wheat varieties suitable for relay cropping
Brand Variety
Public Certified Roane
Public Certified Hopewell
Buckeye Parker
Wellman W 141
AgriPro COKER AgriPro Cooper
AgriPro COKER Coker 9436
VA. Tech. McCormick
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15in wheat
