Long Island Tree Service and Lawn care expert Sterling Churgin, demonstrates Radial Trenching in this educational video. Sterling Churgin is a Board Certified expert New York arborist. His NY tree service, Sterling Tree Service & Lawn Care includes lawn care, lawn fertilizing and lawn sprinkler systems. Let Sterling and his team give you a free estimate for lawn treatment, a customized lawn sprinkler system or any one of their tree care services.