double arrow

Тексты для дополнительного чтения

Mechanical Engineering

THE TRACTOR

Speaking of farm machines, the tractor must necessarily be mentioned in the first place. To-day one cannot imagine practically any agricultural work done without a tractor. This steel horse is always ready for the job, day and night in any weather. With ease and grace it cuts through hard soil, sand and snow, bogland and marshes. Having a mighty pulling power, a tractor can pass through any difficult ground.

No other vehicle is better adapted to haul and work all kinds of agricultural machinery and implements than a tractor. It is a machine usually powered with a gasoline or Diesel engine and is used to draw and work agricultural implements for ploughing, sowing, harvesting, mowing and a large variety of other jobs. A tractor is also used to cut roads, dig ditches and pits, uproot stumps, cut the bush, etc. The tractor can be wheel or caterpillar type. The former is more powerful. Versatile and economical as it is, the tractor finds in fact no end of useful applications in farming, not to speak of lumbering where skidding tractors are the best means of bringing cut timber from out of the forests. Tractors can be used both for stationary and field work. Many agricultural machines are tractor-propelled, that is to say there is a power take off (PTO) to the tractor-hauled implement; or else, the farming devices are tractor-borne. On virgin and long-fallow lands heavy tractors with breaker ploughs are essential.

Land reclamation on boglands, calling for drainage, requires heavy-type tractors to which bog-and-brush ploughs are attached. Of course, as other machines, the tractor is being constantly improved.


Понравилась статья? Добавь ее в закладку (CTRL+D) и не забудь поделиться с друзьями:  



Сейчас читают про: