A plough is a 3-piece attachment for completing field work. Roughly explained, a plough consists of the plough body, a plough-beam and the towing device. Ploughs can be used for a broad range of tasks on the field: Alongside the loosening of the ground, the plough can also be used for the turning and mixing of the ground. Furthermore, the ground can be made rougher using a plough and this makes it more accessible for outside influences- such as oxygen. Weeding can also be done without problem with a plough. Due to its broad range of application, the plough is now an attachment which cannot be done without. They are as variable in their versions as they are in the work which they can do. Due to the fact that no plough is suitable for each and every type of ground, the main distinction between the different versions is their appropriateness according to the ground conditions. As well as the different ground conditions the actual cultivation product also plays a big role: these create different expectations of the plough. Therefore, the effect of different factors must be well-balanced when it comes to cultivators. The pulling power must be balanced with the ground resistance and consistency as well being balanced with the friction against the machine itself and also its blade. ploughs are generally split into two groups: bed plough and sweeping plough. Whilst the bed plough only ploughs the ground with blades that go in one direction, the sweeping plough has blades that go both left and right and plough the ground in both directions and on the way to one side of the field and on the way back. In the history of agriculture the plough used to be pulled by hand and then later by animals. As industrialisation began the introduction of the first fully mechanical cultivator followed. The cornerstone for this development was laid in 1850 by the British engineer John Fowler. He created the first steam-powered plough. Now, all cultivators are attached to different types of tractors by a steel frame. Depending on the version they can either be attached as a crop growing plough, a semimounted plough or an attached plough. As well as the normal and well-known plough types there are also special ploughs for specific crops or specific ground types, for example the potato plough which has symmetrical blades. This sort of plough filters the loose ground in such a way that it is easier for the farmers to then pick the potatoes by hand. Two well-known plough manufacturers are Kverneland and Kuhn.