Every once in a while you hear an idea and are dumbfounded why didn't I think of that first? Some farm land is rocky. A farmer plows the field and then has to

Every once in a while you hear an idea and are dumbfounded why didn't I think of that first? Some farm land is rocky. A farmer plows the field and then has to manually pick rocks before planting. Otherwise the rocks would destroy their equipment. This is slow, hard and backbreaking work. I will note that those who have forsaken plowing and use what's known as no-till farming do not have this problem. But this is still a huge market if the 'Roomba for rocks' is cost effective. Video: https://www.youtube.com/watch?v=loZlyeXVxQA&t=3s https://www.youtube.com/watch?v=loZlyeXVxQA&t=3s