Once thought to be an innocent bystander to field crop production, common ragweed can "drastically reduce soybean yields," according to University of Nebraska-Lincoln research. In dense populations, the loss was shown to be 40-76%.
Even with new dicamba-resistant soybeans, pre-emergence, residual herbicides are needed to mitigate yield loss due to weed competition, provide a longer time for soybean to establish, and reduce selection pressure for weeds resistant to post-emergence herbicides.
Nebraska prospective plantings for 2018 for corn, at 9.3 million acres, are down 3% from 2017. Nebraska soybean prospects, at 5.6 million acres, are down 2% from 2017. Find more prospective plantings at the state and national levels.
University researchers report results from studies conducted on herbicide tolerance trait, row spacing (15-inch vs. 30-inch), and soybean maturities (early vs. late) at three locations of the Soybean Management Field Days in summer 2017.