threshing(redirected from Wind winnowing)
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See M. Partridge, Farm Tools through the Ages (1973).
separation of the seeds (or fruits) from the ears, tassels, heads, and cobs of plants. It is one of the basic operations in harvesting grain and other agricultural crops. It is performed by combines and threshers in the field and at the threshing floor and is usually combined with cleaning and grading of seeds (grain). The quality of threshing work is evaluated by the degree of completeness and the number of broken seeds and seeds that remain in the straw and chaff.