Best Time to Apply Urea Fertilizer for Crops Tips for Nitrogen Management in Winter Wheat Integrated Pest and Crop Management UWMadison Nebraska wheat grower Pete Miller says his winter wheat crop near Lodgepole, Nebraska is a complete disaster and failure. , #NebraskaAg #wheat Top dressing on a wheat crop is usually done 3 weeks after emergence. Understanding your soil type will help you determine your application rates. In sandy soil, for example, you could do