RE: weed control in clover plots
For grasses try Fusilade II, Venture or Post ultra. For broadleafed weeds 2,4-DB, Caliber, Cobultox, Tropotox plus, Clovitox plus or Embutox. For grass and weeds: Princep Nine-T, Simadex, Simazine. These are for Ontario. You need to check for USA registration at your local agricultural office. Some herbicides are better for some weeds. You need to match them to what you are trying to eliminate.
BUT; weeds play an important role in deer nutrition, So; unless you're trying to get rid of grass, weeds aren't that bad.
Dan O.