There was a formula that I learned in an ag engineering class at Cornell for calculating HP requirement to moldboard plow.. I can't remember it at the moment but should be able to find it someplace. Engine HP was not considered as rated PTO HP but was considered relative enough to it even though you obviously don't use the PTO to plow but measure via a dynamometer from that point. Anyhow, on the heavier soils here it takes 20 HP per 16" bottom. 24HP per 18" bottom going to maximum recommended depth. Engine HP is a more critical measure today as electrical, hydraulic, misc systems consume more HP versus a tractor made during the 1970's that may lack partial or full power shifting and air-conditioning plus system monitors.
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Today's Featured Article - An AC Model M Crawler - by Anthony West. Neil Atkins is a man in his late thirties, a mild and patient character who talks fondly of his farming heritage. He farms around a hundred and fifty acres of arable land, in a village called Southam, located just outside Leamington Spa in Warwickshire. The soil is a rich dark brown and is well looked after. unlike some areas in the midlands it is also fairly flat, broken only by hedgerows and the occasional valley and brook. A copse of wildbreaking silver birch and oak trees surround the top si
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