A tillage combination is an agricultural attachment , which consists of a mostly PTO-driven soil cultivation device and a seed drill.
First of all, a rotary harrow prepares the soil for sowing and crushes larger clods of earth and levels the soil (another under the harrow ). The actual seed drill is attached to the rotary harrow. This mostly works with a three-point hitch on the power harrow, which can be lifted out using a hydraulic cylinder. This means that the seed drill does not need to be modified and it can also be used on its own. The typical working width for a seedbed combination is three meters.
In the transport position, the seed drill is lifted slightly backwards over the rotary harrow. A relatively short transport length is thus achieved. It should be noted, however, that the attachment covers the rear lights on most tractor types and therefore a lighting system must also be attached to the seed drill as the rearmost device. In addition, the not insignificant weight must be taken into account. A large lever arm is created especially when lifting with the seed drill lowered (e.g. at the headland). Depending on the type of tractor, a front weight is therefore necessary. In addition, this weight is also used for driving comfort and the smoothness of the tractor.
The advantage of a seed bed combination is that two work steps are combined. Thus, the compaction of the soil is reduced by driving over it several times. In addition, there is the possibility of saving costs and reducing environmental pollution. The latter is only achieved, however, if the tractor power for the seedbed combination is correctly dimensioned and driven accordingly.