I had more calls on wheat and barley that are turning up a little yellow despite some N applications. Richard Taylor has related similar issues on the soil. Keep in mind their soils contain low CEC's however the symptoms are similar. I have sent growers away with recommendations to get a side by side soil test good and bad area to compare and see if the soil can speak to the issue. The cases I recieved are from non manured areas and I suspect in an effort to cut costs proper soil nutrition might have been taken a back seat. Bad choice with the market the way it is.
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micronutrient deficiency « Weekly Crop Update