10 BULLETIN 209, U. S. DEPARTMENT OF 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 
then- 
own 
roots. 
On re- 
sistant, 
stocks. 
Acres. 
2.1 
1.8 
3.5 
9 
1.2 
""*308* 
122 
187 
94 
83 
209 
""317" 
i4i" 
74 
137 
1 
Livermore 
Acres. 
1.4 
3.3 
2 
16.6 
2 
1.4 
109 
112 
124 
306 
117 
91 
Chico 
80 
Colfax 
Mountain View 
Oakville 
262 
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 
Geyserville 
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. 
