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There are some crops that they've been trying for years to harvest robotically but they just require too many input variables that a human can see in seconds but a robot just can't do it yet. Do a search on harvesting cabbages with robots, for example they're close but not yet there.

Things that are grown on trees and bushes and are also delicate. Most cereal crops and plenty of ground/root vegetable cultivation is already mostly automated.

Anything that's processed into something else is likely to be more readily automated, such as grains and canned or frozen produce.