"Things You Wouldn't Know If We Didn't Blog Intermittently."
I've seen similar mechanical shakers used. Here's one being used for the Walnut harvesthttps://www.youtube.com/watch?v=IV6HsfOOwqgNote, since its hard shelled they let the nut fall to the ground, and then it is swept up. And for Olives https://www.youtube.com/watch?v=Oi_mBQBtYScIn this case, note the use of a mechanical "reverse umbrella" fruit catcher. That speeds things up instead of having to have workers spread a catcher under each tree.
Thank you for the links, Wales. I've added the walnut one to the post.
Pecan trees are also shook for their fruit, I would expect other crops are also harvested this way..... just can't think of any others at the moment.