Boulder County’s open space tax could go permanent. Farmers want it to do more to support agriculture.

Boulder County’s open space tax could go permanent. Farmers want it to do more to support agriculture.

Since their historic creation in 1967, Boulder County’s open space sales taxes have protected more than 100,000 acres, preserving trails and habitat while helping small farms survive in a region where land is scarce and costly. Now, as county commissioners prepare to vote Aug. 12 on whether to place a permanent extension of one of the four existing open space taxes on the November ballot, some farmers say the measure doesn’t go far enough to kee…