MINNEAPOLIS — The Wizard of Oz’s Yellow Brick Road may have been fictional element. Some springs solid yellow small grain fields are not. Although few reports of early seasoning yellowing have come in to date, Memorial Day Weekend is just around the corner and historically that’s often the time one of the causes of early season yellowing is observed. Follow this link to an article I posted in 2016 that discusses the most common causes of early season yellowing.
— Jochum Wiersma, University of Minnesota Extension