Oles+innspill+til+alle+grupper

Her legger jeg inn ting jeg finner, som jeg tror kan være relevant for oppgavene deres.

The first engine-powered farm tractors used steam and were introduced in 1868. These engines were built as small road locomotives and were operated by one man if the engine weighed less than 5 tons. They were used for general road haulage and in particular by the timber trade. The most popular steam tractor was the Garrett 4CD.

http://inventors.about.com/od/tstartinventions/a/tractors.htm

** Agriculture and Farm Innovations  **

Farming and farm machinery have continued to evolve. The threshing machine has given way to the combine, usually a self-propelled unit that either picks up windrowed grain or cuts and threshes it in one step. The grain binder has been replaced by the swather which cuts the grain and lays it on the ground in windrows, allowing it to dry before being harvested by a combine. Plows are not used nearly as extensively as before, due in large part to the popularity of minimum tillage to reduce soil erosion and conserve moisture. The disk harrow today is more often used after harvesting to cut up the grain stubble left in the field. Although seed drills are still used, the air seeder is becoming more popular with farmers. Today's farm machinery allows farmers to cultivate many more acres of land than the machines of yesterday.

http://inventors.about.com/library/inventors/blfarm.htm

- The **history of agriculture in the United States** covers the period from the [|first settlers] being taught how to grow corn by the [|natives] up to the present day. http://en.wikipedia.org/wiki/Agricultural_history_of_the_United_States

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   A brief outline of    sheep farming in New Zealand  The first Sheep were landed in New Zealand by Captain Cook in 1773. The Sheep population grew to 70.3 million in 1982 but has now declined to 43.1 million due to declining profits compared to other types of farming. ||
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http://www.sheepworld.co.nz/SheepFarming.htm