plow-bottom surface

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• plow — plowable, adj. plowability, n. plower, n. /plow/, n. 1. an agricultural implement used for cutting, lifting, turning over, and partly pulverizing soil. 2. any of various implements resembling or suggesting this, as a kind of plane for cutting… …   Universalium

• agricultural technology — Introduction       application of techniques to control the growth and harvesting of animal and vegetable products. Soil preparation       Mechanical processing of soil so that it is in the proper physical condition for planting is usually… …   Universalium

• Oliver Farm Equipment Company — Oliver Corporation redirects here. For the typewriter manufacturer, see Oliver Typewriter Company. Oliver 80 tractor The Oliver Farm Equipment Company was an American farm equipment manufacturer from the 20th century. It was formed as a the… …   Wikipedia

• Plane (tool) — A plane is a tool for shaping wood. Planes are used to flatten, reduce the thickness of, and impart a smooth surface to a rough piece of lumber. Special types of planes are designed to cut joints or decorative mouldings.Hand planes are generally… …   Wikipedia

• Plough — Plow redirects here. For the Canadian soldier, see Edward Chester Plow. Plowman redirects here. For the surname, see Plowman (surname). Furrow redirects here. For other uses, see Furrow (disambiguation). For other uses, see Plough… …   Wikipedia

• coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… …   Universalium

• List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …   Wikipedia

• Reynolds-Alberta Museum — The Reynolds Alberta Museum, in Wetaskiwin, Alberta, Canada, one of 18 provincially owned and operated historic sites and museums, honours the spirit of the machine . It traces the mechanisation of Alberta s transportation, aviation, agricultural …   Wikipedia

• AGRICULTURAL LAND-MANAGEMENT METHODS AND IMPLEMENTS IN ANCIENT EREẒ ISRAEL — Ereẓ Israel is a small country with a topographically fragmented territory, each geographical region having a distinctive character of its own. These regions include: the coastal plain, the lowlands, the hilly country, the inland valleys, the… …   Encyclopedia of Judaism

• technology, history of — Introduction       the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …   Universalium

• iceberg — /uys berrg/, n. 1. a large floating mass of ice, detached from a glacier and carried out to sea. 2. Informal. an emotionally cold person. 3. Australian Informal. a person who swims or surfs regularly in winter. 4. tip of the iceberg, the first… …   Universalium