A newly ordered study will address a problem Marshfield parents and officials have been trying to solve for years — the scarcity of athletic fields. The Community Preservation Committee voted June 12 to commission the $18,440 study from Gale Associates, an engineering company in Weymouth, and the Board of Selectmen endorsed the decision unanimously on Monday. Community Preservation Committee chairman Tom Whalen said the committee is concerned that Marshfield is running out of town-owned land on which to build fields. Also, existing fields have been difficult to maintain, he said, because sports schedules are too tight to allow the grass to rest between use. The study should include a maintenance strategy for existing fields as well as a plan for steps the town can take to increase the number of fields, he said. He anticipates the study will be complete in three to four months.