A lorry would be the same as a long haul, transport vehicle. A tractor is designated as a construction vehicle that usually stays on the field, with attachments that can be used to cultivate, sow, and fertilize (as well as putting attachments on the front such as buckets to lift organic matter in order to make short distance transports). I am in Canada, and we do not say lorry. We say "heavy vehicle", "18-wheeler", "semi", "semi-truck", "truck-and-trailer".

In the UK a tractor is a particular type of vehicle used in agriculture for towing. It is not a truck or a lorry and doesn't have any space to carry anything much except the driver. A tractor is a slow moving vehicle with 2 big wheels at the back and 2 small wheels at the front. It is used on farms to pull machinery and trailers, and can usually also have attachments at the front like a snow plough or a bucket/scoop. Although they can legally be driven on roads it is not what they are for. A tractor is specifically made to have great pulling power instead of speed or acceleration. Most tractors are very slow and very wide. Nobody is happy driving behind a tractor.

I'm from the US. Yes, we use "tractor" as the name for a type of general-purpose farming vehicle that can perform a variety of useful functions after attaching a specialty trailer unit such as a plow, harrow, mower, rake, baler, or other functional unit. "Tractor-trailer" is one of several names that we use for a class of freight vehicles that consist of a pulling unit called a "tractor" or "semi-tractor" coupled with one or more trailer units.

A tractor is a tractor (not a lorry or a truck) and, yes, that's exactly what a tractor does. It pulls things on farms.

Hello Lily! That is correct - the word "tractor" is a large vehicle, with unusually large wheels and a powerful engine, that is used on farms. When pulling a trailer (its usually a special trailer designed for a tractor) you would call it a "tractor-trailer". I hope that helps!