Unpruned Vine According to the Umbrella System
A diagram depicting an unpruned vine trained according to the umbrella system. This image shows stem renewal. This system is also known as the two-cane Kniffin system.
Keywordsumbrella, vine, grapevine, grape, grape vine, unpruned vine, umbrella system, two-cane kniffin, kniffin
Government Printing Office Yearbook of the United States Department of Agriculture (Washington, D.C.: Government Printing Office, 1897)