Threshing is the process used to separate the chaff, the protective covering around the grain, and the kernel of grain used for food, from a plant’s stalk. Farmers used flails to remove the chaff and grain from the stalk and to crack open the chaff.

Threshing is the process used to separate the chaff, the protective covering around the grain, and the kernel of grain used for food, from a plant’s stalk. Farmers used flails to remove the chaff and grain from the stalk and to crack open the chaff.