When Cook County voters head to the polls for the March primary election, they might be asked to open their wallets, too. There could be a referendum on the ballot asking voters to approve a property tax hike for the Forest Preserve District of Cook County.  The wish list of deferred maintenance and other projects totals nearly $200 million, district records show. There are lots of invasive plants. Cracking parking lots. Hiking trails that need some love. Conservationists and some fiscal watchdogs have been sounding the alarm for years.  Friends of the Forest Preserves is one of three nonprofits that are lobbying the Forest Preserve District Board of Commissioners to put the referendum to voters.  Click here to read more at WBEX.org…