Steve,
I'm not sure where your literature has come from, and it would be interesting to know. But here are some links to the best current information for Florida Citrus, published by the University of Florida, and which represents what we actually do in our industry:
An excellent discussion of Floridas citrus soils:
http://edis.ifas.ufl.edu/ss403
A discussion of fertilizer management on calcareous soils:
http://edis.ifas.ufl.edu/ch086
many other articles on the subject:
http://edis.ifas.ufl.edu/topic_citrus_nutrition_and_fertilization
I've taught citrus production for the last 29 years, and have seen many changes in our industry. But nutrition management is something that has changed less than most issues. Our department has produced nearly half of the current production managers in Florida's citrus industry, and it was I who taught them their citrus nutrition, in most cases. I try to keep entirely up-to-date on the subject (for obvious reasons), and we are fortunate that the Citrus Research and Education Center of the University of Florida -- the world's largest citrus research facility, is just a few km from here, and we've had a very friendly working relationship with them for many years.
The IFAS-EDIS site is undoubtedly the very best source for current information on all aspects of Florida's citrus industry, as well as its other agricultural industries.
Malcolm
