Found it! Had been digging in my files looking for a nutrient deficiency list I copied from a book (source: forgotten 😐 )

Lack of/or Levels too low of:
Nitrogen = overall yellow leaf, including veins.

Magnesium = yellow between veins (resembles iron deficiency)

Boron = small, stunted new leaves that appear unusually thick. Curly edges.

Potassium = Older leaves browning, edges drying, leaf crinkling and splotching.

Manganese = mottling new leaves with checkering effect between veins.

Iron = yellowing of all parts of leaf except veins.

Sulfur = lack of pigment in all parts of new leaves.

Hope this list is helpful.
Barb