TESTING GRAPE VARIETIES IN THE VINIFERA REGIONS. 



17 



These adaptability ratings therefore represent the behavior of each 

 variety under the conditions existing at the several vineyards ex- 

 pressed in terms that permit comparison with its behavior elsewhere. 

 They are not based on a comparison with other varieties in the same 

 vineyard. Each variety is therefore rated on a scale based on its 

 own standard of excellence rather than on any arbitrary scale for- 

 mulated for application to all varieties. It is believed that this 

 method renders possible a truer expression of the reaction of each 

 variety to different soil and climatic conditions than would be pos- 

 sible by using any arbitrary scale of measurement of growth. 



To illustrate, Aramon X Rupestris Ganzin, No. 2, planted at each 

 of three experiment vineyards in 1904, at Fresno was rated 97; at 

 Livermore, 83; and at Lodi, only 46. This shows that at Fresno 

 the growth was very satisfactory, and it was therefore rated at 97. At 

 Livermore the growth was good, but not nearly so good as at Fresno; 

 it was therefore rated at 83. At Lodi it made a very poor growth, 

 which as compared with the growth made at Fresno was as 46 to 97, 

 or when compared to perfect growth as 46 to 100, i. e., 46 per cent. 



Table IV. — Resistant and direct-producing varieties of grapes in eleven experiment 

 vineyards in California, showing the year of planting in each vineyard and the relative 

 grotvth rating. 





Experiment vineyard. 



Variety. 



d 

 2 



o 



o 



d 

 8 



d 



> 



>> 



© 



a 



© 



03 



O 



a 



> 



3 



-3 



o 



a 



d 

 I 



M 



6 



C3 



a 



o 



a 



O 



a 



o 



3 



o 



Adobe Giant: 



Year of planting 



1906 

 89 



1906 

 96 



1906 



82 



1907 

 99 



1907 

 93 



1906 



98 



1906 

 93 



1906 



87 



1903 

 85 



1904 

 93 



1904 



85 



1904 

 92 











1903 

 90 



1904 

 95 



1905 

 95 



1904 



98 



1904 



98 



1904 



78 



1904 



87 



1907 

 90 



1904 

 89 



1905 



89 



1904 



90 



1904 

 92 



1904 

 94 



1607 



Growth rating 











87 



(Aestivalis X Monticola) X (Ripa- 

 ria X Rupestris, No. 554-5): 







1904 

 92 



1905 

 81 



1904 

 93 



1904 

 93 



1904 



67 



1908 



Growth rating 







89 



(Aestivalis X Rupestris) X Ripa- 

 ria, No. 227: 









Growth rating 

















Aramon X Rupestris Ganzin, No. 1: 

 Year of planting 



1906 

 94 



1906 

 93 



1913 



1904 



97 



1904 



95 



1904 



96 



1904 

 98 



1904 



97 



1904 

 71 



1907 



87 



1904 

 96 



1904 



83 



1904 



88 



1904 



98 



1904 

 46 



1905 

 94 



1908 



Growth rating 



85 



Aramon x Rupestris Ganzin, No. 2: 

 Year of planting 



1908 



Growth rating 



83 



Aramon X Rupestris Ganzin, No. 9: 



1907 



Growth rating 



95 



Aramon X Riparia, No. 143 A: 



Y ear of planting 



1907 



















95 



Arizonica Phoenix: 



1912 

 20 



1906 

 91 



1906 

 93 



1906 

 88 







1905 

 94 



1907 

 95 































Australis: 



1906 

 90 



1906 

 88 



1906 

 81 



1903 



97 



1903 

 94 



1904 



88 



1904 

 92 



1904 



85 



1904 



89 



1907 



87 



1904 

 60 



1904 

 90 







1904 

 72 



1907 

 60 



1907 

 51 



1904 

 78 



1903 

 89 



1903 

 99 



1904 



83 



1904 

 92 



1904 



84 



1908 





89 



Barnes: 



1907 





91 



Berlandieri, No. 1: 



Year of planting 



Growth rating 





85756°— Bull. 209—15- 



