Farmers say current system protects water while keeping costs down, but environmental groups pin the plans as a piece of Iowa’s water quality crisis
Sen. Ken Rozenboom and his family have farmed and raised hogs for decades in south central Iowa.
The Rozenbooms, like most livestock operators in Iowa, collect the hog manure in on-site lagoons, pump it into tanks and transport it to nearby fields where it is incorporated into the soil as fertilizer…