10 BULLETIN 209, U. S. DEPARTMENT OP AGRICULTURE. 



ACREAGE IN THE EXPERIMENT VINEYARDS IN CALIFORNIA. 



The plantings and graftings in the California experiment vineyards 

 now comprise the areas shown in Table I. 



Table I. — Size of the twelve experiment vineyards in California of the Bureau of Plant 

 Industry and number of varieties planted in each. 





Area. 



Number of varieties. 



Vineyard. 



Area. 



Number of varieties. 



Vineyard. 



Resist- 

 ants 

 and 



.direct 

 pro- 

 duc- 

 ers. 



Vinifera. 



Resist- 

 ants 

 and 



direct 

 pro- 

 duc- 

 ers. 



Vinifera. 



On 

 then- 

 own 

 roots. 



On re- 

 sistant 

 stocks. 



On 

 their 

 own 

 roots. 



Onre- 

 sistanr 

 stocks. 





Acres. 

 2.1 

 1.8 

 3.5 

 9 



1.2 

 7 



308 

 122 

 187 

 94 

 83 



209 



141 



74 



137 



Livermore 



Lodi 



Mountain View 



Oakville 



Acres. 

 1.4 

 3.3 

 2 



16.6 

 2 

 1.4 



109 

 112 

 124 

 306 

 117 

 91 











80 











262 





1 



317 







Stockton 

















GENERAL PLAN OF PLANTINGS IN THE EXPERIMENT VINEYARDS. 



All the plantings for comparative tests and study are made in 



regular checks of 10 vines of each variety, and all the larger plantings 



of resistant varieties are grafted in regular checks, usually of 10 vines 



each, and, where only preliminary readings are desired, the number of 



grafts of each variety put in have been a divisor of 10 in a check of 10 



vines. 



PHENOLOGICAL RECORDS. 



Each vine or graft receives its block, row, and vine number. A 

 complete history and accurate records are kept of all varieties from 

 the time they are planted or grafted. Their behavior is closely noted, 

 detailed descriptions are made of the vines and their respective fruits, 

 and their value for specific uses and adaptability to different condi- 

 tions are recorded. Table II summarizes the climatic observations 

 made at the different vineyards. 



Table II. — Temperature and rainfall at the twelve experiment vineyards of the Bureau of 

 Plant Industry in California. 



Maximum Temperatures (° F.). 



Vineyard. 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



80 



85 



95 



106 



118 



115 



115 



112 



Ill 



105 



93 



81 



74 



78 



83 



94 



104 



111 



114 



116 



106 



96 



82 



74 



73 



88 



89 



86 



98 



110 



107 



108 



99 



91 



82 



78 



73 



77 



84 



101 



110 



107 



115 



113 



108 



98 



84 



74 



79 



83 



91 



102 



108 



116 



116 



110 



113 



103 



98 



79 



83 



87 



88 



98 



101 



105 



108 



106 



105 



98 



89 



80 



77 



79 



88 



95 



108 



108 



113 



107 



108 



99 



- 87 



75 



70 



72 



80 



91 



104 



104 



110 



104 



105 



91 



78 



67 



76 



76 



85 



94 



104 



106 



111 



99 



109 



95 



84 



75 



77 



75 



86 



95 



106 



109 



110 



105 



110 



98 



84 



74 



77 



76 



82 



91 



104 



109 



106 



101 



111 



97 



82 



72 



67 



70 



80 



89 



102 



105 



110 



103 



104 



90 



84 



66 



An- 

 nual. 



Brawley 1 



Chico 



Colfax 



Fresno 



Geyser ville 



Guasti 



Livermore 



Lodi 



Mountain View 



Oakville 



Sonoma 



Stockton 



118 

 116 

 110 

 115 

 116 

 108 

 108 

 110 

 111 

 110 



111 



110 



1 Data for four years. 



