Posted by Hugh MacKay on October 05, 2009 at 03:13:33 from (216.208.58.120):
In Reply to: Re: Disc on Super M posted by IH fan on October 04, 2009 at 08:12:09:
IHFan: And there is the problem, disking at 6.5mph. Disks start bouncing at slightly over 5 mph, you may not see it, but it creates a rough subsoil. Rough subsoil acts exactly the same as the road grader operator that didn't cut the whole road to depth of deepest pot hole. The pot holes show up again within days. Fields will act the same.
The plows and disks we've seen to date have been engineered for 4-5 mph. Plow has the ability to cut a uniform depth, then disk will chop everything within that depth, then we use a cultivator to smooth it out, and the cultivator should be up around 6-7 mph. Much over that and most cultivators I've seen start bouncing, leaving soil like waves on water. Shank breakage will increase dramatically at speeds over 8 mph.
You may not think this is important, but at the cost of crop inputs today, you want that seed germination close to perfect. Single biggest factor in achiving that is having that seed bed smooth. Again don't confuse smooth with level. I say that as most of what I said in thread has gone right over your head. Perhaps, had you been paying the bills back in 4640 days, rather than driving dad's tractor, you may understand this a bit better.
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