We work extensively with both winter and spring versions of wheat, barley, oats and rye, both conventional and organic.
The options here are too numerous to mention, but the rule we find is the worse the soil the better the response to ACF bacteria products. Not only do they improve the nutrient use efficiency, but they also help establishment and tillering. (See case studies or contact us for a copy of Independent Studies)
We have a wide range of Nutrel products that are excellent on cereals, but three worth mentioning: If you have Mg or Mn deficiency then K-Mag or K Man Special are excellent foliar sprays. Both have secondary nutrients and trace elements. Also, as with pretty well all other crops, B-Evergreen plus applied before flowering will ensure there is nutrient available for grain fill.