GRAPE-PRUNING ON THE PACIFIC SLOPE 153 



A. HEAD PRUNING : VASE-FORM 



1. High trunk: 



2. Medium trunk : 



3. Low trunk : 



with 



(a) Fruit spurs or 



(6) Half-long canes and re- 

 newal spurs or 



(c) Fruit canes and renewal 

 spurs ; canes vertical 

 or bowed. 



B. HEAD PRUNING : FAN-SHAPED ; TRELLISED 



1 . High trunk : Fruit canes and renewal spurs ; canes de- 

 scending. 



2. Medium trunk : Fruit canes and renewal spurs ; canes 

 horizontal or ascending. 



C. CORDON PRUNING 



1. Vertical: Spur; half-long; cane. 



2. Horizontal-unilateral : Spur ; half-long ; cane. 



3. Horizontal-bilateral : Spur ; half-long ; cane. 



All possible combinations indicated by this table represent 

 24 variations. Some of these combinations, however, are not 

 used and some are rare. The most common are shown in 

 Figs. 23, 24, 25, 26 and 27. 



Figure 23 B represents a headed, vase-formed vine, with a 

 medium trunk and short fruit spurs. This is the most common 

 system used in all parts of California and is suited for all small 

 growing vines which bear on the lower bwds, for most wine 

 grapes and for Muscats. The unit of pruning in this case is a 

 fruit spur of 1, 2, or 3 internodes, according to the vigor of the 

 variety and of the individual cane. 



Figure 23 A differs from 23 B only in the higher trunk and 

 longer arms. It is commonly used for Tokay and other large 



