Cottage Grove Polyethylene Materials and Prods Mfrs 9480 Jamaica Ave S Up North Plastics manufactures quality agricultural plastics, including silage bags, bunker covers, and brewer's grain bags. Cottage Grove MN Polyethylene Materials and Prods Mfrs Up North Plastics Inc www.upnorthplastics.com silage bags bunker covers feed storage agricultural plastics silage agbags pit covers Ag-Bag Agri-Pac Klerk SiloFlex brewer's grain bags bale wrap bagging forage corn silage haylage bunker silo silo bags bagging machines Up North silage bags bunker covers feed storage agricultural plastics silage agbags pit covers Ag-Bag Agri-Pac Klerk SiloFlex brewer's grain bags bale wrap bagging forage corn silage haylage bunker silo silo bags bagging machines Up North Business Reviews Up North Plastics Inc Testimonials