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2. Disc harrow - Wikipedia

   en.wikipedia.org/wiki/Disc_harrow

   A Simba disk harrow An Evers disk harrow. A disk harrow is a harrow whose cutting edges are a row of concave metal discs, which may be scalloped or set at an oblique angle. It is an agricultural implement that is used to till the soil where crops are to be planted.

3. Harrow (tool) - Wikipedia

   en.wikipedia.org/wiki/Harrow_(tool)

   Harrows differ from cultivators in that they disturb the whole surface of the soil, while a cultivator instead disturbs only narrow tracks between the crop rows to kill weeds. There are four general types of harrows: disc harrows, tine harrows (including spring-tooth harrows, drag harrows, and spike harrows), chain harrows, and chain-disk harrows.

4. Avery Company - Wikipedia

   en.wikipedia.org/wiki/Avery_Company

   They built a three-story manufacturing facility, producing check rowers, stalk cutters, corn planters, cultivators and hand tools. [4] In 1883 the company was capitalized at US$200.000 and renamed the Avery Planter Company. [1] Page from the Avery Company catalog describing their "65hp Single Cylinder Straight Flue Steam Traction Engine"

5. Tractor, timber and agricultural machinery in the Soviet Union

   en.wikipedia.org/wiki/Tractor,_timber_and...

   1926 - started producing tractor cultivators for continuous tillage . 1928 - started production of tractor plows. In 1928, the country produced 1,300 tractors 1930 - commissioned in 1930 Stalingrad Tractor Factory design capacity of 144 tractors a day. Since that time, the Soviet Union began the mass production of tractors.

6. Cultivator - Wikipedia

   en.wikipedia.org/wiki/Cultivator

   A cultivator (also known as a rotavator) is a piece of agricultural equipment used for secondary tillage. One sense of the name refers to frames with teeth (also called shanks ) that pierce the soil as they are dragged through it linearly .

7. List of Allis-Chalmers tractors - Wikipedia

   en.wikipedia.org/wiki/List_of_Allis-Chalmers...

   Model UC (1930-1953): Also known as All-Crop or Cultivator Model UI (1937-1947) Allis-Chalmers W series; Model WC (1933-1948) Model WD (1948-1953) Model WD45 (1953-1957) Model WF (1937-1951) Model RC (1938-1941) After the second world war Allis Chalmers operated factories in the United Kingdom at Totton (to 1949) in Totton Hampshire and ...