Selected commercial field locations in Iowa* Crop rotation sequence
2007 2008 2009
Waterloo, Black Hawk County Soybean, followed by winter wheat Soybean Corn
Manchester, Delaware County (field 1) Soybean Corn Soybean
Manchester, Delaware County (field 2) Corn Soybean Corn
Boone, Boone County (field 1) Soybean Corn Soybean
Boone, Boone County (field 2) Corn Soybean Corn
Table 2: Corp rotation sequence in selected commercial fields in Iowa from where soil samples were collected to assess the colony forming units per gram of dry soil of Fusarium virguliforme.
*Fields were selected by consultations and a memorandum of understanding between Iowa State University and grower(s).