Now, with many farmers aging and seeing limited interest from their children in working the land, the combination of competition, environmental regulations, and other forces is driving more of the state’s cranberry farmers out of the business.

“It’s a big undertaking running these farms, and it didn’t make sense for us to continue,” said Glorianna Davenport, 76, whose family spent 33 years running Tidmarsh Farms in Plymouth.

Three years ago, after years of depressed prices and with none of their children interested in taking over, Davenport and her husband sold their 610-acre farm, which once produced as many as 3 million pounds of cranberries a year.

Tidmarsh Farms is among a growing wave of Massachusetts cranberry farms that have closed, consolidated with other farms, or contracted, selling off less productive parts of their land for development or conservation.

Over the past decade, the state has lost more than a quarter

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