Extractions: Other Corny News Network articles can be viewed at the CNN Archives Published 2 June 2004 (Rev. 6/4/04) URL: http://www.kingcorn.org/news/articles.04/NitrogenLoss-0602.html The Printer-Friendly version (PDF format) of this article is compatible with Adobe Reader for PocketPC. Click on the Adobe button for information on how to download, install, and use Reader for Pocket PC. Please let me know whether this user option is useful to you. R.L. (Bob) Nielsen Bottom Line Estimating N loss due to soggy soil events is a complicated procedure and not terribly accurate. Decisions about supplemental N fertilizer are further complicated when stand loss or plant stunting reduce the overall yield potential of a flood- or ponding-damaged field. Fields that eventually exhibit obvious N deficiency symptoms prior to pollination may benefit from a supplemental application of 30 to 50 lbs. of fertilizer N. Read on only if you want the gory details.
Cropping Issues In Northwest Minnesota Newsletter May Rains and Potential for Nitrogen Loss. Minnesota Crop eNews. Univ. of Minnesota Coop. Ext. Service UM Extension Minnesota Crop eNews http://www.nwroc.umn.edu/Cropping_issues/2004/issue5/06_11_04_No_1.htm
Extractions: Search Volume 1 Issue June 11 Has Recent Wet Weather Resulted in Soil Nitrogen Loss? The recent heavy rains have raised questions about nitrogen (N) losses. In wet field areas it is common to find off-color crops, but that does not necessarily equate to N shortage. So be careful as you initially are seeing plant response to wet conditions (slowed root activity and growth.) The good news is that farmers have probably not lost much of their N application during this latest round of wet weather. The bad news is that significant N loss could still occur if wet weather continues. On the good news side, soil temperatures during the first three weeks of May at the NW Research and Outreach Center (NWROC) at Crookston were in the high forties to low fifties which are not ideal for denitrification to take place. I am not going to go into the denitrification process as Bobbie Holder explained the process in the May 28 Issue 3 of this newsletter. Nitrogen is lost from soils as nitrate-N with leaching (water movement through soil) and denitrification (biological conversion to N gases with saturated soil). It is the conversion of soil N and applied N (fertilizer and manure) to nitrate, and subsequent excessively wet, warm soils, that enhance the potential for N losses. Nitrogen in organic or ammonium forms will not be subject to loss. Use of fertilizer products containing more ammonium and application closer to a period of wet conditions result in less loss. According to Univ. of Illinois data (
