The crumbling farm economy in Northwestern Minnesota is starting to erode local government budgets. Polk county commissioners are struggling to balance the county budget. It appears employee layoffs and reduced services for county residents are inevitable. Mainstreet Radios Dan Gunderson reports. Polk county tax revenue took a big hit when hundreds of East Grand Forks homes were washed off the tax rolls by the flood of 1997. But its budget problems started long before the flood. For the last half dozen years Polk county commissioners took the path of least resistance. They held down tax increases by trimming a l