Combines retain plant material, which can be deposited in the next field. To prevent the spread of weed seed, farmers should clean off the combine between harvesting fields, according to NDSU.
Combine clean out can help reduce weed spread thefencepost.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from thefencepost.com Daily Mail and Mail on Sunday newspapers.