I use my field Cultivator to prep last years garden for this years planting. I plan to plant potatoes, beans/peas and possibly some corn along the tree side. I cut this field cultivator down to around 4-5 foot to fit behind my tractor better. There are 5 tines I could add more, but 5 do a good job and are relatively easy to pull.
I have read that a Field Cultivator does a much better job loosening your soil for planting than a tiller. Which is because it does not disturb the layering of the soil. Or what is living/dormant in those layers as much as a tiller does. Also it is less likely to kill worms and other beneficial animals living in the soil.