To see what Greenfield Citrus Nursery has to say about fertilizing citrus in Arizona just follow the link.

http://www.greenfieldcitrus.com/grow.htm

As far as foliar feeding goes it can be helpful in keeping the leaves green. The seaweed and fish emulsion also helps prevent damage from some pests. The vinegar in a foliar feed I don't think is advisable. Vinegar is used to lower ph in soil by adding it to the water you water your trees with.
Vinegar is also used as a herbicide and can kill plants and leaves if sprayed on the foliage in high doses. Our water company is SRP and spraying the leaves often with water where I'm at is not advisable because our water is hard. The hard water deposits can build up on the leaves and damage the foliage. A few drops of vinegar per gallon may prevent the deposits from accumulating. Is that why you are using it?

Oops, I forgot.

I compost with de-smelled steer manure at least twice a year in Jan and Oct.

I mulch with 3-4 inches of pine bark over the manure.