Monocultures exist mainly to facilitate our current state-of-the-art mechanisation, so the short answer to your question is "yes", with the possible exception of grains (who grow naturally in clumps).
But as the sibling comment pointed out, sufficiently advanced robotics will be prohibitively expensive for a long time ahead. I'd like to think that one day in the distant future a team of robotic "monkeys" can go out and harvest only the perfectly ripe oranges from a plot of diverse mixed vegetation. We are already starting to see this for tomato harvesting in greenhouses, so it's not completely unfounded.
As for cattle, the good news is even the free range ones are surprisingly quite automated already. The dairy cows can milk themselves with robots, and the cow fitbits are quite effective at identifying the ones who need vet attention.
Right, but to me you are arguing that we don't necessarily need 100% automation, we just need to (re)design the tools in a way to support smaller farms. Instead of huge tractors that can cover vast areas of land, we would be better off by having smaller tools that can make the individual farmers more productive.
But as the sibling comment pointed out, sufficiently advanced robotics will be prohibitively expensive for a long time ahead. I'd like to think that one day in the distant future a team of robotic "monkeys" can go out and harvest only the perfectly ripe oranges from a plot of diverse mixed vegetation. We are already starting to see this for tomato harvesting in greenhouses, so it's not completely unfounded.
As for cattle, the good news is even the free range ones are surprisingly quite automated already. The dairy cows can milk themselves with robots, and the cow fitbits are quite effective at identifying the ones who need vet attention.