Govts decide farming subsidies, allowable environmental damage & even exploitative immigrant labor practices based on the prices their voters would be willing to pay. This means that an order of magnitude improvement in efficiency will likely lead to reduced subsidies rather than increased profits. Also, the value of food is subjective. Increasing lobster or caviar supply will decrease its perceived desirability just as fast. So infinite scaling laws stop applying pretty quickly.
The one agricultural industry that is ripe for disruption is the fake-DOP industry. A lot of European premium processed DOP goods are expensive because they are manual labor intensive. If you can train some minimum-wage laborers in a 3rd world nation to do the manual labor, then you can sell practically-perfect Parmigiano-Reggiano or Jamon-Iberico for a fraction of their price. As of now, all the fake DOP products are vastly inferior (it isn't rocket science) and still incur huge labor costs because they're still produced in 1st world countries.
Premium sausages, Premium cheeses, Premium sliced meats are ripe for disruption. It won't replace these products in top-tier $$$-$$$$ restaurants. But the more numerous $-$$ restaurants would be salivating at the prospect of such a replacement.
I am already seeing some of this. ~~Columbian~~ (Colombian) Burrata is both cheaper and a better product for US customers due to faster supply chains. I'd like to see more of this from developing and underdeveloped countries with the right climate, soil and water table.