The Martha’s Vineyard Agricultural Society has announced what it is calling a quiet fund-raising campaign this week to raise money to help offset the cost of its recent land purchase in West Tisbury.

The society and the Polly Hill Arboretum bought nearly 10 acres of land from the Martha’s Vineyard Museum last summer for $1 million. The agricultural society contributed $800,000 to the purchase and the arboretum contributed $200,000.

The land lies between the arboretum and the fair grounds.