Cutting and threshing header for harvesting machine

A harvesting machine, comprising a cutting and threshing header for use in harvesting standing crops, and an agricultural vehicle attached to said cutting and threshing head, the cutting and threshing header comprising:

• cutting means for cutting crop material including seeds or grains and varying lengths of stalk, said cutting means extending over substantially the full width of the header;
• and
• threshing means extending over a width within said header substantially equal to the width of the cutting means, and wherein said threshing means includes a primary thresher comprising:
• a curved mesh surface extending over the full width of the threshing means;
• and
• a rotor co-operating with said mesh surface to urge the cut crop material through an annular space between the rotor and the mesh, thereby causing separation of said cut crop material into seeds or grains, which pass through said mesh for collection, and waste material including said varying lengths of stalk, which is discharged from the threshing means over substantially the full width thereof.