Depends on the weight of the combination, but most silage trailers I've seen are the type which attach to a Class 7 or Class 8 truck, either using a kingpin and fifth wheel, or else using a pintle and clevice. If these are 'for hire' vehicles, they would require a Class A CDL in the United States, Class 1 licence in Canada, and EC licence in South Africa, and I believe it's now called a C+E licence in the United Kingdom (bear in mind we entertain questions from a worldwide audience).
In the United States, if it's registered as a farm vehicle, and not used on a 'for hire' basis, individual states have jurisdiction over licencing requirements for farm use vehicles, as they are exempt from CDL requirements. Other countries do not differentiate between vehicles of that class which are used on a 'for hire' or private usage basis.
No. There is a tractor license? Not in Australia. The answer is still no. Having a tractor license would not let you even drive a forklift.
You need no license to drive a farm tractor as long as you do not drive it on public roads.
You can drive an agricultural tractor unaccompanied to and from tractor driving lessons at the age of 16.
There is really no courses on learing to drive a tractor trailer, however you can get information online or maybe if you know someone who has a tractor trailor you can practice with theirs.
If you can't meet the requirements to obtain a DOT medical card, then no.
no
can a person temporarily drive a tractor on a highway with a driver license
No, you can't.
18 for intrastate commerce, 21 for interstate commerce. That's a federal law.
The legal age to drive a tractor on the road is 16
You can operate any motor vehicle of which you are liscensed to drive. So, you may drive a car to your tractor-liscense test, but not a tractor. (provided you have a drivers liscense)
No, you cannot.