What do you think is going to happen with all the new jobs undocumented immigrants leave?

Consider many states that depend on undocumented workers to work in the farms and other labor jobs truthfully not many Americans will perform those jobs for that pay that the undocumented immigrants were making and this is with a recession? Do you think agriculture will suffer? Do you think the US will become more mechanized? Do you think the US will offer more working visas to immigrants of other country ?