In 1892, John Froelich invented and built the first gasoline/petrol-powered tractor in Iowa. The history of the engines with in tractors go back as far as 1850.
I have no clue
5,000
Traces do not go back that far in history.
Depends on the size of the tractor and what work it is doing.
14000 ago
Make that several thousand years!
The history of human flight doesn't go very far back in time.
As far as it needs to go.
I haven't seen a history text book in many years, so my information goes only as far as I can remember.
That depends on how far back you want to go. A difference engine was considered as far back as 1786. Babbage create his first one in 1822.
How far back does family go back
The breed history of the Singapura does not go far back in history they have only been seen since 1991. This is a well known cat now.