Hanson, Mark J.Riley, Michael J.Stefan, Heinz G.2011-10-302011-10-301987-02https://hdl.handle.net/11299/117313Use of Minnesota takes has increased, placing demands on lake managers to maintain or to improve water quality. Although many different management and lake rehabilitation techniques have proven effective, the complex nature of the in-lake processes makes selection of a technique and prediction of effectiveness very difficult. Lake managers are often confronted with expensive projects that must actually be tried to determine their effectiveness.en-USReport