SORGHUM SMUTS AND VARIETAL RESISTANCE 
47 
Table 15. — Mean daily temperature and precipitation for seven days preceding 
and seven days following the secdings of sorghum at Columbia, Mo., in stated 
years x 
[T=trace] 
1915 
1916 
1917 
1918 
Seven-day period 
c3 
ft 
c3 
03 
ft 
i £ 
-2 o 
03 
03 
2 
a 
.2 
"c3 
p, 
03 
a 
A 
c3 
ft 
S3 
a** 
03 
03 
a 
"c3 
'ft 
'3 
03 
U 
c3 

c3 
ft 
2£ 
& 
03 
2 
a 
o 
~c3 
ft 
'3 
£ 
Pm 
c3 
A 
03 
ft 
a g 
S3 
e3 
i 
a 
_o 
"c3 
ft 
'o 
M 
Ph 
Prior to seeding 
June 3 
June 4 
June 5 
June 6 
June 7 
June 8 
.June 9 
°F. 
71 
76 
77 
76 
58 
60 
60 
In. 

.76 
.21 
.01 
.47 


June 10 
June 11 
June 12 
June 13 
June 14 
June 15 
June 16 
°F. 
65 
66 
67 
70 
70 
70 
64 
In. 

.03 

.01 

.15 

June 1 
June 2 
June 3 
June 4 
June 5 
June 6 
June 7 
°F. 
66 
60 
63 
73 
75 
66 
66 
In. 
0.35 


.09 
.18 

T 
June 4 
June 5 
June 6 
June 7 
June 8 
June 9 
June 10 
°F. 
76 
78 
76 
68 
70 
74 
79 
In. 
0.10 






Total or average 
68.3 
1.55 
67 4 
.19 
67 .62 
74.4 
.10 
After seeding 
(June 10 
June 11 
June 12 
June 13 
June 14 
June 15 
.June 16 
72 
71 
79 
68 
61 
66 
72 
1.26 
.36 
T 
.10 
.73 

1.08 
June 17 
June 18 
June 19 
June 20 
June 21 
June 22 
June 23 
66 
71 
63 
73 
66 
78 
73 

T 
T 
.19 

.04 
.62 
June 8 
June 9 
June 10 
June 11 
June 12 
June 13 
June 14 
69 
68 
68 
76 
80 
66 
60 
.28 
.07 


.17 
.20 

June 11 
June 12 
June 13 
June 14 
June 15 
June 16 
June 17 
82 
76 
74 
77 
84 
88 
88 



T 
.17 


Total or average 
69.9 
3.52 
70 
.85 
69.6 
.72 
81.3 
.17 
i The dates of planting were June 9, 1915; June 16, 1916; June 7, 1917; and June 10, 1918. 
In general, the infections obtained in 1915 were among the highest, 
although direct comparison with plants grown from the same seed 
lot is not possible. During this season the average temperature 
for the seven days preceding seeding was 68.3° and for the seven 
days following planting 69.9° F. The precipitation for the first 
seven days was 1.55 inches, and for the second period of seven days 
it was 3.52 inches. 
The average daily temperature in 1916 for the seven days preceding 
seeding was 67.4°, and for the seven days following it was 70° F. 
The precipitation was 0.19 inch for the first period of seven days 
and 0.85 inch for the second period of seven days. The temperatures 
for 1917 were practically the same as for 1916, the average for the 
seven days preceding being 67° and for the seven days following 
seeding 69.6° F. The precipitation for the first seven days was 
somewhat lower, 0.62 inch; while for the seven days following it was 
slightly more, or 0.72 inch. In 1918, however, the average tempera- 
ture forthe seven days preceding seeding was 74.4° F., or arjout 
7 degrees higher than in the preceding two years, and the tempera- 
ture for the seven days following the seeding was 81.3° F., or more 
than 10 degrees higher. This higher temperature was associated 
with extremely low precipitation, there being only 0.1 inch of rain 
during the seven days preceding and 0.17 inch in the seven days 
following seeding. 
Not only was the precipitation very much less in 1918; it was also 
differently distributed as compared with the other two seasons. In 
1918 the last rain before seeding occurred seven days previously, 
and there was no rain until five days after seeding except a mere 
