The nitrogen can be applied either pre-plant or chemigation can be used. It is important that all N is applied prior to tasseling. Draw and label the parts of a wheat spike and a barley spike. 2 points for each point. Some substitution for extended discussion in an area and limited in another.
Full credit requires the answer to cover all points.
Take-all, rhizoctonia root rot, Pseudocercosporella foot rot, Cephalosporium. Compare and contrast the two general classes of dwarfing genes used in wheat to reduce height. Full credit was generally given if most of the elements were present. If it elevated the average, I kept it. Both reduce height.