A seedbed combination is a combination of agricultural implements for seedbed preparation after basic tillage by plowing . By using combined devices, the number of necessary crossings in the field up to the point of sowing can be reduced to protect the soil as well as to reduce operating costs and environmental pollution (e.g. through fuel consumption). The same applies to the order combination .
Depending on the type of soil, the seedbed from light consist harrow sections or heavier Gareeggezinken ( cultivator tines ) and subsequent rolls or rolling harrow (Krümlern). A tractor engine power of around 10-18 kW is required for each meter of working width. The harrow or the cultivator tears up the soil and loosens it, the crumbler crushes the pieces of soil and reconsolidates the loosened soil at the sowing depth. If the combination is set correctly, the top two to six cm of the soil become a finely crumbly, loose top layer above the sowing depth (the sowing horizon) of the plant species to be sown and an area around ten cm below the sowing horizon becomes a loosened, but coarser structured and reconsolidated root space prepared. Reconsolidation of the root space is necessary so that the soil moisture in the subsoil can also be used by the plants via the capillary action.
- Bodo Frahm, BGJ Agrarwirtschaft, 4th edition, Ulmer, Stuttgart, 1980, 1991, ISBN 3-8001-1049-0 , p. 116 ff.
- Horst Eichhorn, Landtechnik, 7th edition, Ulmer, Stuttgart, 1952, 1999, pp. ISBN 3-8001-1086-5 , p. 169