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Seeding date recommendations key to best wheat yieldNebraska Early planting leaves winter wheat vulnerable to diseases and insect pests do less damage as temperatures cool, said a University of Nebraska-Lincoln specialist. Early planting gives most crops a boost, but winter wheat is a cool season crop that does better when planted on its recommended seeding date, said Bob Klein, cropping systems specialist at UNL's West Central Research and Extension Center. Cooler temperatures and shorter days seem to discourage diseases like crown root rot or reduce the time for wheat streak mosaic infection to take place in the fall, as well as some insects that feed on winter wheat. Early planted wheat also uses a lot of soil moisture it will usually need later in the growing season. Klein cited some research done at the Research and Extension Center a few years ago. Three plots planted on Sept. 2, Sept. 15 and Sept. 25 yielded very differently. The earliest plot produced two bushels of wheat per acre, Klein said. The next plot yielded 27 bushels/acre and the last, planted close to the recommended date for the region, yielded 42 bushel/acre. Climate across Nebraska varies widely-some say as much from east to west as from eastern Nebraska to the East Coast. Because of that, recommended seeding dates vary from around the first of September in the west to the first of October in the southeast, Klein said. Sometimes weather delays planting until after the recommended seeding date or a producer may follow another crop with winter wheat, Klein said. In those instances producers should compensate with starter fertilizer placed right in the seed furrow or with the seed to make up for that later than recommended seeding date. Information on recommended seeding dates is available in the Web, in NebGuides and at county extension offices, Klein said. Another source of information is the new 2008 Seed Guide now available. Along with the results of wheat variety tests and recommended seeding dates for 2008, the guide includes final planting dates by county. 9/15/08 Date: 9/10/08 Advertisement
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