sean: Those methods are most applicable to apples. Less so to stone fruit and very little to citrus. You can plant citrus pretty thick, like 5ft by 10ft and expect too have a long term orchard. The trees will grow together and you will need to prune to keep the alley open. If they get too thick the bottom will shade out and you'll only have fruit on the top of the tree.

You don't need any kind of trellis for citrus. You'd just be wasting your time and money. Try it with apples if you want and forget the citrus.

The Fruitnut

I agree, you don't prune citrus anything like you do an apple.
RE organic, I raise all my citrus organic always. Apply heavy mulch and keep your drip on top of the mulch so the water runs down through it and helps it compost down.
good luck.
Arthur the date palm guy

Bill Castle has done a lot of research on this in your state.

I saw some of it in Citrus Industry Magazine