Many thanks to Dr. Mongi Zekri who sent me this information to share.
GREAT photos are included to help us diagnose!
Zekri, M. and T.A. Obreza. Boron and chlorine for citrus trees.
UF Coop Ext. Ser.
http://edis.ifas.ufl.edu/pdffiles/SS/SS61900.pdf
Zekri, M. and T.A. Obreza. Molybdenum and nickel for citrus trees.
UF Coop Ext. Ser.
http://edis.ifas.ufl.edu/pdffiles/SS/SS61800.pdf
Zekri, M. and T.A. Obreza. Iron and copper for citrus trees.
UF Coop Ext. Ser.
http://edis.ifas.ufl.edu/pdffiles/SS/SS61700.pdf
Zekri, M. and T.A. Obreza. Manganese and zinc for citrus trees.
UF Coop Ext. Ser.
http://edis.ifas.ufl.edu/pdffiles/SS/SS61600.pdf
Zekri, M. and T.A. Obreza. Nitrogen (N) for citrus trees.
UF Coop Ext. Ser.
http://edis.ifas.ufl.edu/pdffiles/SS/SS58000.pdf
Zekri, M. and T.A. Obreza. Phosphorus (P) for citrus trees.
UF Coop Ext. Ser.
http://edis.ifas.ufl.edu/pdffiles/SS/SS58100.pdf
Zekri, M. and T.A. Obreza. Potassium (K) for citrus trees.
UF Coop Ext. Ser.
http://edis.ifas.ufl.edu/pdffiles/SS/SS58300.pdf
Zekri, M. and T.A. Obreza. Magnesium (Mg) for citrus trees.
UF Coop Ext. Ser.
http://edis.ifas.ufl.edu/pdffiles/SS/SS58200.pdf
Zekri, M. and T.A. Obreza. Calcium (Ca) and sulfur (S) for citrus trees.
UF Coop Ext. Ser.
http://edis.ifas.ufl.edu/pdffiles/SS/SS58400.pdf
