Sulfur and Nitrogen Deficiencies Look Similar. How to Tell the Difference in Winter Wheat. Tessenderlo Kerley Tips for Nitrogen Management in Winter Wheat Integrated Pest and Crop Management UWMadison 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 New Year's Eve Retrofete 25 Best New Years Eve Outfit Ideas Sure to Dazzle Top dressing Nitrogen: 3 Keys to Increasing Returns Decisive Farming by TELUS Agriculture