One of the oldest ranches in West Marin will soon be added to the portfolio of farmland protected from development by the Marin Agricultural Land Trust. On Tuesday, the trust secured $418,350 of public funds to purchase the development rights to the Parks Ranch, a historic 177-acre property just north of Tomales, ensuring the land will remain dedicated to agriculture and protected from any pressures of subdivision and sprawl. The county Board of Supervisors unanimously…