Threshing concave for combine harvester

A threshing concave for a combine harvester, comprising:

• a crop processing device which is arranged on the threshing concave with threshing elements adjustable between an active position to thresh crop and an inactive position,
• adjustable elements which are arranged downstream of an inlet to the threshing concave and can be adjusted between an active position and an inactive position to control passage of crop, and
• an adjustment mechanism for separate adjustment of the crop processing device and the adjustable elements,
• wherein the adjustment mechanism comprises a moveable adjustment element which is coupled to the crop processing device and to the adjustable elements, and when the moveable adjustment element is moved to a first position, the threshing elements of the crop processing device are disposed in the active position and the adjustable elements are disposed in the active position;
• when the moveable adjustment element is moved to a second position, the threshing elements of the crop processing device are disposed in the active position and the adjustable elements are disposed in the inactive position;
• and the moveable adjustment element is moved to a third position, the threshing elements of the crop processing device are disposed in the inactive position and the adjustable elements are disposed in the inactive position.