Remember copper deficiency?

Copper may only be needed every ten to twenty years on our soils, but that is long enough to forget. CSBP found a site near Jerramungup this year, and looks like they have confirmed a response. Note the weak stems, and heads which are more floppy. Maybe you can also see the first signs of poor grain fill.  At a later stage, accumulated sugars in the stems will make the crop darker.