2007 Iowa Crop Performance Test - Soybeans
The Iowa Crop Performance Test--Soybeans is conducted each year to provide information farmers need to select the best varieties or brands for their production conditions.
Within Iowa, there are six testing districts and three testing sites within each district. Entries were subdivided based on maturity group and advertised response to soybean cyst nematode. In addition to these tests, there were two tests containing a variety of material--conventional herbicide lines, low-linolenic lines, and VistiveÂ® lines. One test was grown in the central region and one in the southern region.
Seed companies, Iowa farmers, Iowa State University and other public breeding programs, and the Iowa Crop Improvement Association may include entries in the Iowa Crop Performance Test--Soybeans. All entries were made voluntarily.
The average yield of all entries at a test site provides an indication of overall production conditions at that location, which could be referred to a table in the article.
The article will describe the testing procedures and characters evaluated which include:
The article will also have descriptive information of each entry's resistance to brown stem rot and phytophthora, and descriptive data of the entries' hilum, flower and pubescence colours, as well as seed type and availability.
The article notes that care should be used in comparing entries that occur in different tables of this report, as growing conditions were not identical for each test; therefore, yield of an entry will vary among tests. The article will highlight the differences and similarities for better comparison.
The article will also discuss the considerations in selecting a variety or brand for planting, which includes the evaluated characters.
If varieties with poor emergence characteristics are grown, plant stands may be seriously reduced when seed is planted more than two inches deep or when soil crusting occurs before emergence.
Article made possible through the contribution of Iowa State University.