There are several different kinds for different purposes.The heavy offset disc are used mostly for deeper tillage and residue management and a 100H.P. tractor would not pull one .Regular wheel discs are used to level,incorporate chemicals,and to cut residue to make planting easier.Blade diameter[14/28 in]and weight make a difference in what size.Older lighter disc such as a JD BWA would let you pull a 20ft disc with wings where as a newer heavier disc might make 14ft a load.Discs are a dry weather tool and can cause compaction.We use field cultivators with levelers or rolling baskets as they come in larger sizes 60ft plus which requires around 500H.P.3 pt discs are used on a few small gardens and are usally small .Discs are not as popular as they once were and unless they are newer ones usually sell for around salvage. The way discs are designed it is hard to have a level seed bed as they pull the dirt in and turn it but can leave a small furrow.
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Today's Featured Article - Talk of the Town: Repairin a Gas Tank - by Staff. This interesting discussion is from the Tool Talk Discussion Forum. Remember that safety is your first priority - make sure you know what you are doing before attempting a potentially dangerous activity!
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