Round Grader

A seed cleaner uses a combination of winnowing with a fan to remove lighter particles (e.g. empty grains) and sifting with sieves on an oscillating screen to remove particles that are smaller (e.g. weed seeds) and larger particles (e.g. straw). This is the removal of any debris or low quality, infested or infected seeds and seeds of different species (weeds) that are foreign to the sample.