Editing Harrow (tool) (section)

===Power harrow===
A rotary power harrow, or simply a power harrow, has multiple sets of vertical tines. Each set of tines is rotated on a vertical axis and tills the soil horizontally. The result is that, unlike a [[cultivator|rotary tiller]], soil layers are not turned over or inverted, which is useful in preventing dormant weed seeds from being brought to the surface, and there is no horizontal slicing of the subsurface soil that can lead to hardpan formation.<ref>Jean-Martin Fortier. [http://store.farmstart.ca/blogs/farmerreviews/12354997-the-rotary-power-harrow-by-jean-martin-fortier "The rotary power harrow"] {{webarchive|url=https://web.archive.org/web/20150214064437/http://store.farmstart.ca/blogs/farmerreviews/12354997-the-rotary-power-harrow-by-jean-martin-fortier |date=2015-02-14 }}, FarmStart Tool Shed, February 18, 2014. Retrieved on 5 March 2015.</ref>