An example of the Agriburbia land planning design is this 640-acre parcel in Southern Weld County, Colorado. It includes for 980 homes, including multi-family town homes to two (2) acre permaculture home sites.
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Each Agriburbia mixed-use campus is centered on an agrarian concept where traditional suburban landscaping and open space is replaced with orchards, vineyards, and other perennial crops for the benefit of the neighborhood and surrounding communities. A limited amount of active recreation area is provided. The balance of the open space is designed as productive organic agricultural landscape.
The folks behind Agriburbia are based in Golden, Colorado. Here's an article about the concept from the Northern Colorado Business Review, for more information.