A solid panel or shield mounted on harvesting machinery, particularly combines and threshers, designed to block crosswinds. By sheltering the cleaning shoe and sieves, it ensures that lightweight grain falls correctly into the collection augers rather than being blown out the back of the machine along with the chaff.
Heard on the job
The wind is picking up, so adjust the windboard on the header to keep the oats from blowing right over the back.
Related terms
Combine harvester
A large self-propelled machine that reaps, threshes, and cleans grain crops in one pass.
Cleaning shoe
The assembly inside a combine harvester that separates the clean grain from chaff and small debris.
Chaffer
The upper adjustable sieve in a combine harvester that separates grain from heavier plant debris.