American Farmland Trust  
Goals include protecting farmland from urbanization and development, eliminating soil erosion, reducing agriculture's impact on the environment, and promoting farming practices that lead to a healthy environment.

Land Trust Alliance
The national umbrella organization of land trusts, the Alliance provides information on land trusts, conservation, conservation easements and other land protection tools.
 
Trust for Public Lands 
The Trust for Public Land conserves land for people to enjoy as parks, gardens, and
 other natural places, ensuring livable communities for generations to come.