It requires far more knowledge: an in depth understanding of the agriculture relating sciences. But less pesticides, less fertilizers, no-till certainly reduces the labor.
How do you figure? Pesticide, Fertilization, Tilling and Harvesting are precisely the types of labor that has been automated and is now done 60-feet wide by 4 miles an hour.
Autonomous vehicles and AI have been vastly oversold as a mean or a source of automation. There's been a huge amount of automation through applying regular machines to things that were previously done by hand and that's still where most labor-saving improvements happen.
But just as much, all these technologies can be used with large scale, industrial agriculture.