Well I bit the bullet on a real nice four row white model 6100 planter with dry fertilizer this week. It is 30 inch spacing. I am going to put some no till coulters on it and liquid fertilizer and was curious as to what I can get by with four horsepower/tractor to pull this thing with in a no till hard ground situation. I currently have a deere 4400 that will work in tilled ground, but am thinking of trading for a 4720, which is probably minimal but looking for insight.