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Plot tour to focus on wheatBy David G. Hallauer Meadowlark District Extension agent, crops, soils, horticulture Kansas In 2007, Karl 92 dominated the Meadowlark Extension District wheat plot in Nemaha County. Will it do so again in 2008? To get a peek at how Karl 92 and 12 other varieties are looking, as we head towards harvest, plan to attend the 2008 Meadowlark Extension District Wheat Variety Plot Tour scheduled for June 3, beginning at 9 a.m. The plot is located at the northwest corner of 184th Rd. (Old Sale Barn Road) and the W Road intersection one mile west of Sabetha. The varieties included in this year's plot, held in cooperation with the Farmers Co-op Elevator at Sabetha and cooperator Doug Edelman include the aforementioned Karl 92, Jagalene, Jagger, Santa Fe, Tarkio, Overley, Smoky Hill, Hawken, Art, Post Rock, 2137, Wesley, and Fuller. We'll discuss varietal characteristics with NE Area Crops & Soils Specialist Dr. Stu Duncan. We'll also chat about the effects of fungicides on wheat yields and share some data collected by KSU Plant Pathologist Dr. Erik DeWolf. Refreshments are sponsored by the Kansas Crop Improvement Association. If you have any questions, contact your District Office or dhallaue@ksu.edu . A tour flyer and variety plot information are available as well under the Crops & Soils link at www.meadowlark.ksu.edu. Dryland corn plot planted The Meadowlark Extension District Dryland Corn Plot at Winchester in Jefferson County was planted on May 19. It consists of 22 varieties from 12 companies on the Elvin Domann farm north of Winchester. Further information on the tour date and signed varieties will be available in the future. Replant decisions Trying to get spring crops planted this year has been, at times, an effort in futility. As we get in to later May, some beans and late planted corn are just coming up. With recent rains, a stand evaluation may be at hand to see whether it will make it through or not. A couple of quick points as you start to make that decision: On the corn side, remember that late emerging corn may be more vulnerable to flea beetles, southern corn leaf beetles, billbugs, and chinch bugs--even with seed treatments. Further, if crusting results in just one of six plants delayed by just two leaf stages, yields can be reduced 4 percent. Uniform emergence is critical. We're also getting pretty late in the planting window for corn. That said, its usually not advisable to replant unless the stand is maybe as little as 50 percent of the desired stand, since late planted corn will have reduced yield potential. If you do replant, and can get seed, an earlier maturing hybrid may be in order. For soybeans, if you can shoot for a final stand of around 100,000 plants per acre, you will, in most cases, maximize yield potential. On lower yield environments, you may even get by with lower populations--assuming you're willing to sacrifice 'top end yield potential' if the season gives you good conditions. Replant decisions are never easy. If there's more information that would assist you in your decision making process, contact your District Office. 6/2/08 Date: 5/27/08
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