Abstract. The mechanization technology in medium soil scarification at 35 cm was done with an aggregate made up of a Challenger MT 765B tractor and a Horsch Tiger 8 AS scarificator. Scarification is done by moving the aggregate after the swing method. Minimum parcel size should ensure working for at least one shift. Technical, technological, and economical performances of the agricultural aggregates are assessed through technical indicators (also called use indicators or operation indicators) such as cultivation depth, cultivation width, cultivation speed, traction force resistance, operation power, operation capacity, energy source load degree and fuel consumption. The mobile aggregate moves at a certain speed determined by the cultivation technology requirements of the cultivation quality and by the agricultural machine traction and operation possibilities. Real operation speed influences the quality of the cultivation. To achieve high quality cultivation, we need to observe specific operation speed (called technological speed). Soil specific resistance influences the operation capacity of the aggregates and fuel consumption per ha. On heavy soils, the operation capacity of the ploughing aggregates is 15÷30% lower than that on medium soils and 25÷30% lower than that on light soils.Scarificator coulter and chisel sharpness has a great influence on traction resistance force. Thus, changing coulter or chisel sharpness from 1 to 3.5 mm makes traction force resistance increase with up to 45%. Other factors also influence traction resistance in soil cultivation agricultural machines, such as technical state, proper assemblage of operating organs, tractor coupling, etc. Specific soil resistance influences the aggregate operation capacity and fuel consumption per ha. On heavy soils, the operation capacity of the ploughing aggregates is 15÷30% lower than that on medium soils and 25÷30% lower than that on light soils. Scarificator coulter and chisel sharpness has a great influence on traction resistance force. Thus, changing coulter or chisel sharpness from 1 to 3.5 mm makes traction force resistance increase with up to 45%. Scarification is done by moving the aggregate after the swing method. Minimum parcel size needs to ensure at least one shift. The land to be scarified needs to be divided into parcels.

mechanization technology, tractor, scarificator

environmental engineering

Presentation: poster