Well, I'm finally getting around to adding something to this thread:
I'm Zone 6, NE Ohio, and our season starts a bit later than others. (Or earlier, if you live in Alaska, *wink*)
I tilled the garden two weeks ago, last year's plot plus 5 feet on two edges. It works out to 22 x 45 feet. Alas, weeds are growing again.
After work, I got the tiller out, a 5hp Troy-Bilt Pony. (Notice how close the garden is to the bee hives? Excellent pollination of everything.)
I set it to four notches down, about four inches of depth. You don't want to go deeper until you make a pass each way.
I ran lengthwise, now almost width wise. I plant my rows width wise. Everything in rows.
After a pass both ways, I drop it down to 6 notches, about 6 inches deep tilling. This aerates the soil nicely, and gives a 12 inch soil bed depth
Here's the almost final row at 6 inch tilling depth. Notice the footprints. I have to walk behind the tiller, rather slowly, guiding it. The final
pass, I can hold it with one hand, and walk along side it. You don't want the footprints, as they are compacted soil prints, and the first rain, it
is all clumpy.
Final pass. No footprints, tilled, and ready to plant.
We are going to plant on Friday, so I'll take pics and add to the thread.