Tractors with huge rubber tires

A tractor must necessarily have very wide tires so as to not get stuck in the mud or soft soil.

But wide tires also serve to distribute the weight more evenly. A heavy-duty tractor may compress and damage the earth beneath it as much as half a meter down - and where the soil is compressed, the yield may be reduced by 50%.

Therefore, some tractors have caterpillars instead of wheels.

Often, the very big tractors will have two sets of rear wheels - some even have two sets of front wheels as well, giving the tractor a total of eight wheels.

The wheels of the biggest tractors are about 2 m high and 60 cm wide.

One wheel may weigh as much as 500 kg, and should you need a spare tire, it may cost you well over 30,000 Danish kroner.

Did you know that:

Tractor championships are held in the disciplines of plowing and pulling heavy loads.

There are also international championships within the art of working with excavators.

The disciplines include dribbling a ball through an obstacle course with an excavator, stacking tires in a pre-defined order - or using the excavator shovel to pour a drink from a bottle into a small drinking glass.