Since we don't use herbicides, we use old fashioned plows, but we have one of these on the way as well. Known as a finger weeder, they were developed in Europe and are a great tool for organic farming weed control.
This is how it will look on our old Farmall 140 when installed.
Last, but not least, we have a lot of these. Anytime you want your produce free for a few weeks, you are welcome to man one with me.