I have since put wind cloth around them, fed, watered and cleared the ground of all vegetation. Will they live?
My Citrus Leaves Turned Yellow and Then Fell Off
The first step is to find out why the leaves turned yellow. The most likely cause is problems with watering: https://www.gardeningknowhow.com/edible/fruits/citrus/tip-on-water-requirements-for-citrus-trees.htm
There are a number of other possible causes. This article will help you look for other possible causes (this article is on oranges, but most citrus are similar): https://www.gardeningknowhow.com/edible/fruits/oranges/yellowing-orange-tree-leaves.htm
To get the most accurate diagnosis, you can take some leaf, branch, soil and roots samples to a professional, either the horticultural extension service, university, or botanic garden. This link will help you locate the nearest office (if you're in the US.) :