It depends. There can be many reasons why a particular farm is not preserved, including:
• Some farms may be in areas which the state or municipalities have designated for future development. For example, the state or municipalities may not wish to see farms preserved which are located within a “Highlands Center”.
• Some farms may not meet the state’s minimum criteria for preservation. To receive state funding towards the costs of preserving a farm, the property must be located within the County’s Agriculture Development Area (ADA), be eligible for farmland assessment, and at least 50% of the land or a minimum of 25 acres, whichever is less, is tillable and consists of soils that can support agricultural or horticultural production (for farms over 10 acres in size).
• Not all farms have sufficient development rights to sell. For example, a farm with limited access via a narrow driveway easement may not be developable. A 20 acre farm in a residential zoning district with a 20-acre minimum lot size may not be developable. A farm which is entirely ag-modified wetlands may not be developable.
• Farmland preservation is strictly voluntary. Farms will only be preserved if the landowner is willing to voluntarily sell the development rights to their farm. Some landowners are unwilling to do so.