THE EFFECT OF SOYBEAN ROW SPACING ON YIELD WHEN PLANTING IS DELAYED
Applied Research
Wayne Flanary
Field Specialist in Agronomy
University of Missouri Extension
St. Joseph
Abstract
\r\n The use of 15-inch soybean row spacing has decreased in northwest Missouri and more growers are adopting 30-inch row spacing. University of Missouri Extension recommends using narrow row spacing when soybean planting is delayed. The optimum planting date is early May in northwest Missouri. The objective of these experiments was to demonstrate soybean yield response when using 15-inch row spacing compared to 30-inch when soybean planting is delayed. Group III indeterminate soybeans were planted as single experiments in a complete randomized block design. In 2011, five varieties were planted in 30-inch and 15-inch rows on June 5. In 2010, ten varieties were planted May 25. Soybeans planted in 15-inch rows yielded greater than those planted in 30-inch rows across all varieties in both years. In 2011, the average yield increase of using 15-inch row soybeans compared to 30-inch resulted in a 15 percent yield increase averaged across the five varieties. In 2010, the average yield increase of 15-inch rows increased yields by 28 percent compared to 30-inch rows. Consideration should be given to narrow row spacing when soybean planting is delayed.
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Poster has NOT been presented at any previous NACAA AM/PIC
This poster is being submitted for judging. It will be displayed at the AM/PIC if not selected as a State winner. The abstract will be published in the proceedings.
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Authors: W.E. Flanary, J.J.W. Crawford, R.W. Chapple
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Flanary, W. Agronomy Specialist, University of Missouri Extension, Missouri, 64473
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Crawford, J. Superintendent Graves Chapple Research Center, University of Missouri Extension, Missouri, 64482
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Chapple, R. Retired Ag Engineer, University of Missouri Extension, Missouri, 64482