Is 28% UAN with glyphosate recommended?
Several calls have come in about adding 28% UAN with glyphosate to kill weeds and also provide a source of nitrogen to crop plants that are yellow and chlorotic from excess rain. This is a less effective practice based on 2 reasons:
#1 – UAN at 1 gallon per acre does not provide enough N for restore optimal N levels for crop growth. A better strategy would be to stream UAN between roles at 10 to 30 gallons per acre.
#2 – 28% UAN does not contain sulfur to remedy antagonistic cations in spray water that can reduce the activity of glyphosate. Ammonium sulfate is required to remedy hard water. AMS and 8.5 to 17 lbs/100 gallons of water will not supply sufficient N for optimum crop growth.
For weed control from glyphosate, AMS is the preferred product. To feed N to crop plants, it is recommended to stream UAN between crop rows and 10-30 gal/A.
- New calculator can help soybean farmers with seed decisions
- U.S., Brazil close to ending cotton trade rift
- U.S.-Japan trade talks hit new farm exports snag
- Ag markets posted a general comeback Wednesday
- Midwest grain growers ‘Invest an acre to feed the world’
- Ag markets turned mixed around midsession Wednesday
- Activists fighting Golden Rice even more in 2014
- U.S. GMO labeling foes triple spending in first half of this year
- Source shows half of GMO research is independent
- White House issues veto threat on bill to block WOTUS rule
- East-West Seed signs marketing collaboration with Monsanto
- How much corn can the ethanol industry use?