Ben Hartman - Using the Lean System to Earn a Comfortable Living on a Farm For: Any size and type of farm Further to our popular Ben Hartman workshop at Cae Tan in January, Ben has agreed to continue to support growers with a Webinar on his Lean Growing System. In this webinar, Ben Hartman, author of The Lean Farm, explains concepts from the lean system that he and his wife Rachel use to earn a comfortable living on less than one acre of land. Ben offers concrete tips that farms of any size