I have a tractor that can pull a 4' disc, but it take at least 3 passes to get good soil for planting. It takes 2.5 hrs to get soil worked up per acre. I then cultipack, fertilize, and seed, and cultipack again. 6.5 acres at 6 hrs per acre, makes for long days. Plots have more wet ground than dry. By discing twice and waiting for ground to dry somewhat, discing again the next day. Would a tiller do the same as discing 3 times? According to King Kutter, a 5' tiller would be what my tractor will handle. My tractor has 4 wd, a HST trans, running at 2200rpm in middle gear.