Answer: It would cut back on workers available since many are immigrants.
Explanation:
Agriculture is one of Georgia's largest industries and it is heavily reliant on migrant labor to do things like harvesting blueberries, onions and melons to name just a few.
Limited immigration would prevent the flow of these immigrants into the state which means that there would be less immigrants to do the harvesting and other agricultural related things. A major effect of this is that at a worst case scenario, this would cost Georgia millions if the crops are not picked on time.