I don’t think we’ve exactly automated agricultural production. Not yet, at least. We have mechanized and industrialized the farming process, of course. Tractors are guided by GPS. Machinery will harvest crops on a massive scale, but, some human labor is still required.

For a lot of the farming process, humans are still intricately involved in the process. I won’t consider it to be truly automated, until such point as when robots take over most of the work.