The point could be made by having it design and print implements for an indoor container grow and then run lights and water over a microcontroller. Like Anthropic's vending machine this would also be an already addressed, if not solved, space for both home manufacturing and ag/garden automation.
It'd still be novel to see an LLM figure it out from scratch step by step, and a hell of a lot more interesting than whatever the fuck this is. Googling farmland in Iowa or Texas and then writing instructions for people to do the actual work isn't novel or interesting; of course an LLM can write and fill out forms. But the end result still primarily relies on people to execute those forms and affect the world, invalidating the point. Growing corn would be interesting, project managing corn isn't.
This is all addressed in the original blog post.
Seriously, what does this prove? The AI isn't actually doing anything, it's just online shopping basically. You're just going to end up paying grocery store prices for agricultural quantities of corn.
We feed it the information as a context to help us make a plan or strategy to achieve or get something.
They are also doing the same. They will be feeding the sensor, weather and other info, so claude can give them plan to execute.
Ultimately, they need to execute everything.
So this is a very legitimate test. We may learn some interesting ways that planting, growing, harvesting, storing, and selling corn can go wrong.
I certainly wouldn't expect to make money on my first or second try!