This new two-page document discusses soil-applied and foliar fertilization for citrus trees as well as mobile and immobile nutrients and how they affect the choice of fertilization. Written by Tripti Vashisth and Chris Oswalt, and published by the UF/IFAS Horticultural Sciences Department.
https://edis.ifas.ufl.edu/hs1373
Iron is one of 16 essential elements for plant growth and reproduction. Most annual plants have a requirement for Fe on the order of 1 to 1.5 lb Fe per acre, compared with nitrogen (N) at 80 to 200 lb per acre. This 8-page fact sheet provides a detailed basic understanding of soil science and plant physiology for diagnosing and correcting Fe problems in plants and soils. Written by George Hochmuth and published by the UF Department of Soil and Water Science, August 2011.
http://edis.ifas.ufl.edu/ss555
This 5-page fact sheet introduces agricultural and horticultural producers to the role and function of the newest identified essential plant nutrient, nickel (Ni). Written by Guodong Liu, E. H. Simonne, and Yuncong Li, and published by the UF Department of Horticultural Sciences, June 2011.
http://edis.ifas.ufl.edu/hs1191