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  2. List of John Deere tractors - Wikipedia

    en.wikipedia.org/wiki/List_of_John_Deere_tractors

    The John Deere GP wide-tread, or GPWT, built from November 1929 to November 1933. The John Deere GP wide-tread Series P, a GPWT with narrowed rear tread width designed to suit potato rows, built between January and August 1930. The John Deere general purpose orchard tractor, or "GPO", from April 1931 to April 1935.

  3. Bulldozer - Wikipedia

    en.wikipedia.org/wiki/Bulldozer

    Bulldozer. A large bulldozer with multi-tine ripper, the Caterpillar D9. A bulldozer or dozer (also called a crawler) is a large, motorized machine equipped with a metal blade to the front for pushing material: soil, sand, snow, rubble, or rock during construction work. It travels most commonly on continuous tracks, though specialized models ...

  4. John Deere Model D - Wikipedia

    en.wikipedia.org/wiki/John_Deere_Model_D

    The Model D was John Deere's first mass-produced tractor, and was released to the public in 1923. It was a standard tread tractor with fixed wheel widths, as opposed to the adjustable wheels of a row-crop tractor. The D was initially equipped with a two-cylinder side-by-side 30-horsepower (22 kW) engine, of 465-cubic-inch (7,620 cc ...

  5. Caterpillar D7 - Wikipedia

    en.wikipedia.org/wiki/Caterpillar_D7

    Caterpillar D7. Two armored D7 bulldozers out on a mission in Ramadi, Iraq. The Caterpillar D7 is a medium track-type tractor manufactured by Caterpillar Inc. and most commonly used as a bulldozer. The D7 was first manufactured in 1938. A series of improved models were later produced, including the D7C in 1955, the D7D in 1959, the 160 hp (120 ...

  6. John Deere - Wikipedia

    en.wikipedia.org/wiki/John_Deere

    19th century. Deere & Company began when John Deere, born in Rutland, Vermont, United States, on February 7, 1804, moved to Grand Detour, Illinois, in 1836, [5] to escape bankruptcy in Vermont. Already an established blacksmith, Deere opened a 1,378-square-foot (128 m 2) shop in Grand Detour in 1837, which allowed him to serve as a general ...

  7. John Deere Model R - Wikipedia

    en.wikipedia.org/wiki/John_Deere_Model_R

    The John Deere Model R tractor was John Deere 's first diesel tractor. A large, heavy tractor, it had fixed wheel widths and was not produced as a row-crop tractor with adjustable axles. The R was followed in the John Deere numbered model series by the John Deere 80, 820 and 830 tractors, which represented evolutionary upgrades to the basi.c R.

  8. John Deere Model L - Wikipedia

    en.wikipedia.org/wiki/John_Deere_Model_L

    Late 1938 models were restyled in line with other Deere tractors, with Henry Dreyfuss cowlings and grilles. In 1940. the 14-horsepower (10 kW) LA was introduced, using a John Deere engine, and the L received a Deere engine in lieu of the Hercules. The LA introduced a power take-off to the L line. Both the L and LA were produced at the same time.

  9. Combine harvester - Wikipedia

    en.wikipedia.org/wiki/Combine_harvester

    The modern combine harvester, also called a combine, is a machine designed to harvest a variety of cultivated seeds. Combine harvesters are one of the most economically important labour-saving inventions, significantly reducing the fraction of the population engaged in agriculture. [1] Among the crops harvested with a combine are wheat, rice ...

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