BULLETIN 197. GRAPE CULTURE IN CALIFORNIA. 137 



For a great majority of our soils and varieties the two Riparia X 

 Rupestris hybrids 3306 and 3309 promise to be superior in every way 

 to the St. George. The former for the moister soils and the latter for 

 the drier. The vigor and bearing of all varieties tested on these two 

 stocks has so far been excellent, and they should in most cases replace 

 St. George in all but the hottest and driest deep soils. 



For the wettest locations in which vines are planted in places where 

 the water stands for many weeks during the winter, or where the 

 bottom water rises too near the surface during the summer the most 

 promising stock is Solonis X Riparia 1616. 



For moist, rich, deep, well-drained soils, especially in the coast 

 counties and on northerly slopes, the St. George is utterly unsuited. 

 The crops on this stock, in such locations, are apt to be small, and 

 the sugar contents of the grapes defective. In these locations the 

 Riparia Gloire is much to be preferred, and will undoubtedly give 

 larger crops of better ripened grapes. 



None of the above stocks give good results, as a rule, in very compact 

 soils. For such soils the most promising varieties are 106 8 in the drier, 

 and Aramon X Rupestris No. 1 or 202 4 in the wetter locations. In 

 dry, shallow soils 420A and 157 11 give promise of being excellent stocks. 



This covers most of the soil conditions which occur in California. 

 The only other cases which demand consideration are the varieties with 

 defective affinity. For these varieties the most promising stock is 1202. 

 This stock makes excellent unions with many varieties which fail on 

 most resistants, and is to be tentatively recommended for Emperor, 

 Ferrara, Cornichon, Muscat, Mataro, Folle blanche, Pinot, Gamay. 

 Gutedel and any varieties which have not given generally satisfactory 

 results on Riparia and Rupestris. 



These recommendations may be summarized as follows: 



For average, good soils in most locations 



1. Drier soils 3300 



2. Moister soils 3306 



For special soils 



3. Dry, deep, in hot regions and locations St. George 



4. Dry, deep, in cooler regions and locations .Rup. Martin 



5. Dry, shallow . . 420A or 157" 



6. Dry and very compact 10G 8 



7. Wet and very compact Aramon X Rup. No. 1 or 202 4 



8. Wet, loose 1616 



9. Rich, moist, deep, well drained in the cooler localities. . .Rip. Gloire 

 For varieties of defective affinity in good soils 1202 



