in order to determine the basic structural parameters of spike-tooth harrows with active tines , the effects of inter - tine distance (L) , the maximum turning angle(α) and device velocity (v) on the degree of soil clod breakup were investigated in field researchers. Dependences of the degree of soil clod breakup on α,v and L have been revealed and increase in α and v was established to increase the soil clod breakup degree.
