Wednesday, 22 June 2005 - 10:00 AM
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Skip Row Corn for Improved Drought Tolerance in Rainfed Corn.

Robert N. Klein, University of Nebraska, 461 West University Drive, North Platte, NE 69101

A skip-row dryland corn plot at the University of Nebraska's West Central Research and Extension Center in North Platte provided a 32% yield increase over corn planted in 30-inch rows in 2003. The idea behind skip-row planting is to keep developing corn plants from using all of the available soil water too early in the growing season. In this trial, all rows of corn were planted and then either plants or one or two rows were removed. In 2004 IANR field trials were conducted across Nebraska at the West Central Research and Extension Center, the High Plains Agricultural Laboratory at Sidney, the Panhandle Research and Extension Center at Scottsbluff, the South Central Agricultural Laboratory near Clay Center, the Haskell Agricultural Laboratory at Concord and the Havelock Farm in Lincoln, as well as near Hayes Center, NE, Tribune, KS, and Akron, CO. Several farmers also tried the system in Nebraska, Colorado, and Kansas. Compared were conventionally planted and skip-row planted yields. Several plots in 2004 had above-average precipitation, including the plot at North Platte, where rainfall was 35% above average in June and 88% above average in July and average in August. Skip-row yields at North Platte ranged from 111 to 116 bushels per acre. The conventionally planted dryland corn averaged 109 bushels per acre. At Akron, CO the conventionally planted corn yielded 16 and 21 bushels/acre at seeding rates of 12,000 and 16,000, respectively. In the plant two skip two the yields were 50 and 47 bushel/acre for the 12,000 and 16,000 seeding rates, respectively. Roundup Ready corn is ideally suited for use in a skip-row corn system. Potential weed problems also could be reduced by planting in a field with good amounts of crop residue.

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