Skip to main content
Article
Fertilizer Nitrogen Application This Fall
Integrated Crop Management News
  • John E. Sawyer, Iowa State University
Document Type
Article
Publication Date
10-13-2015
Abstract
Much of the primary fertilizer nitrogen (N) for corn is applied in the spring as pre-plant or sidedress, where efficiency of N use should be greatest. Fall N fertilizer application success can be enhanced by following several suggestions: only use anhydrous ammonia; apply in late fall after soils cool to 50 degrees F (4-inch depth) and are trending cooler (the colder the better, and most years in Iowa this is sometime in November); consider a nitrification inhibitor to further slow nitrification to nitrate; and avoid fall application to soils that are more prone to wetness or leaching (poorly or excessively drained soils).
Copyright Owner
Iowa State University
Language
en
File Format
application/pdf
Citation Information
John E. Sawyer. "Fertilizer Nitrogen Application This Fall" (2015)
Available at: http://works.bepress.com/john-sawyer/88/