How is the winnowing basket used?

A winnowing basket is used in agriculture, particularly in the processing of grains. It allows for the separation of chaff from the harvested grain by tossing the mixture into the air; the lighter chaff is blown away by the wind while the heavier grains fall back into the basket. This traditional technique effectively cleans the grains for storage and consumption. Additionally, the design of the basket, often with a flat, wide shape, aids in maximizing air flow during the winnowing process.