Effects of mechanical pruning on grapes
California Agriculture 34(7):33-34. DOI: 10.3733/ca.v034n07p33.
Fred Jensen is Viticulturist, Cooperative Extension, San Joaquin Valley Agricultural Research and Extension Center, Parlier; L. Peter Christensen is Farm Advisor, Fresno County; Robert H. Beede is Staff Research Associate, Parlier; George M. Leavitt is Farm Advisor, Madera County.
Not available – first paragraph follows:
Grape growers have long used hedging or mowing to remove part of the wood on vines trained to cordons. This pre-pruning of superfluous one-year-old wood facilitates the work of the pruners, who then remove all but 10 to 20 spurs per vine selected for fruiting.