Nitrogen loss - spring 2013
An aspect of this spring that is somewhat different from past wet springs is the late corn planting and slow growth. From my observations in north central Iowa, the corn crop at this time is the smallest I remember in the 2000s. Corn N demand has been very low so far, and for late planted fields, season-long demand may be less due to lower productivity.
When warm, wet soils provide a good environment for microbial mineralization, the conversion of organic N to ammonium. Ammonium will accumulate under anaerobic conditions. While corn may die in ponded field areas, if replanted, the accumulated ammonium will supply crop-available N and perhaps an amount adequate to meet crop needs.
For corn fields with intended sidedress or split/sidedress N application, major loss conditions this spring have been avoided. For fields that had fall or early spring N applied, a visual way to check if corn will respond to additional N is to apply sidedress N fertilizer strips as soon as possible across several fields and watch the corn response. This can give a visual clue to potential for more N need and provide reference areas for mid-vegetative stage crop greenness measurement or canopy sensing.
- Irrigation Association to release online courses with Cal Poly
- Monsanto to invest $120 million in Argentina
- Ag markets ended Tuesday mostly lower
- Fat molecules influence function of key photosynthesis protein
- Monsanto honored for efforts in developing agriculture in Vietnam
- Corn stocks top 1.2 billion bushels
- U.S. GMO labeling foes triple spending in first half of this year
- Source shows half of GMO research is independent
- Activists fighting Golden Rice even more in 2014
- White House issues veto threat on bill to block WOTUS rule
- How much corn can the ethanol industry use?
- East-West Seed signs marketing collaboration with Monsanto