This "Identify the nutrient problem" section will guide you through the process of identifying which nutrient is likely causing problems in your wheat crop. Select the item that best corresponds to your situation: this key will ask you to identify the location of symptoms and the color of whole shoots. Going through these steps will take you to an information sheet about the likely source of your crop problem.
The information on nutrient deficiencies you reach by going through this problem key can also be accessed through the List of nutrient problems in the main menu.