Multiple Trunk ( Low Cordon) Trellising System. Yield, Quality, Cost are important in that order. If you don't have a minimum yield you are not in business. - ppt download
The Backyard Vineyard – How to Build a Trellis - thechapdaddy.com
Illustrated Grape Vine Training Methods | Wine Folly
Overhead Trellis or High Cordon Training? - YouTube