210 
Journal of Agricultural Research 
Vol. XI. No. s 
much more extreme in 1909 than in 1915. The years 1908, 1911, 1913, 
and 1916 were the most extreme, to judge from the evaporation rates. 
It was during these years that no fruiting bodies were observed. 
Table III .—Weather and soil conditions during the months of May to August for the 
years 1908 to 1916 at Akron , Colofl 
Condition and month. 
1908 
1909 
1910 
IOII j 
1912 
1913 
1914 
1915 
1916 
Evaporation (inches): 
I 
May. 
7 * 709 
6.825 
5 * 797 
7*323 1 
7.097 
5 * 835 
5. 608 
5*033 
7. 811 
June. 
8.637 
7. oo3ac 
8. 722 
9 * 753 j 
6* 750c 
8. 178 
7. 509c 
5* 883ac 
7*979 
July. 
8 .474 
9* 396c 
9. 763 
9 * 774 | 
7. 618 
9 - 259 
8. 654 
6. 660 
11.1x6 
August. 
7.826 
8* 538 
7. 142c 
8-944 1 
7.048 
9- 302 
8.364 
5.82oac 
7. 216 
Mean. 
8.162 
7.941 
7* 856 
8.949 1 
7.128 
8. 144 
7 * 534 
5*849 
8. 53 i 
Rainfall (inches): 
May. 
3 - 30 
1.87 
2. 06 
i* 15 
2.86 
I.44 
1. 46 
4 * 13 
2. 24 
June. 
3*37 
3- 323 C 
1.38 
1. 48 
3 * 39 C 
1*35 
3 * 54 C 
3 * 75ac 
2.09 
July. 
2. 42 
4. 61C 
1.47 
l- 34 
3*58 
1.85 
1.66 
1.10 
1. 77 
August. 
1-47 
3 - 77 
3- 72C 
1.30 
1. 58 
1. 14 
1.05 
3*5iac 
2.82 
Mean. 
2 * 39 
3*39 
2. 16 
1.32 
2. 60 
I* 45 
i -93 
3* 12 
2. 23 
Rainy days (trace or over): 
May. 
9 
12 
13 
12 
15 
10 
12 
16 
12 
June. 
18 
i sac 
5 
10 
lie 
12 
lie 
igac 
10 
July. 
12 
9c 
5 
13 
17 
10 
. 17 
21 
13 
August. 
12 
6 
I 2 C 
10 
11 
7 
14 
i7ac 
15 
Mean. 
13 
II 
9 
11 
*4 
10 | 
I 
18 
13 
Mean temperature (°F.): 
i 
May. 
55 
53 
53 
58 
55 
57 
57 
52 
55 
June. 
64 
64ac 
67 
70 
63C 
67 
68c 
6oac 
64 
July. 
70 
71c 
74 
70 
70 
72 
72 
67 
75 
August. 
69 
72 
67c 
69 
69 
75 
7 i 
64ac 
69 
Mean. 
65 
65 
65 
67 
64 
68 
67 
61 
66 
Soil temperature (°F.): 
May. 
74 + 
57 
59 
62 
60 
63 
63 
56+ 
60 
June. 
74 
67ac 
63 
77 
68c 
75 
76c 
71+ac 
73 
July. 
77 
64+c 
85 
80 
76 
80 
81 
74 
81+ 
August. 
75 
77c 
77 
76 
83 
79 
7iac 
77 
Mean. 
75 + 
63+ 
7 i 
74 
70 
75 
75 j 
71+ 
75 + 
Maximum air temperature 
(°F.): 
May. 
90 
85 
87 
9 i 
92 
9 i 
85 
88 
70 
June. 
93 
93 ac 
95 
98 
89c 
97 
93 C 
82ac 
80 
July. 
94 
94c 
zoo 
95 
96 
103 
96 
95 
93 
August. 
98 
95 
95c 
97 
96 
98 
101 
94 ac 
83 
Minimum air temperature 
(°F.): 
May. 
24 
24 
29 
28 
28 
31 
32 
27 
41 
June. 
41 
4iac 
33 
43 
37c 
37 
38c 
3 sac 
49 
July. 
42 
51c 
51 
46 
47 
43 
49 
40 
60 
August. 
46 
51 
31c 
41 
48 
53 
43 
39 ac 
56 
Number of days during 
which available soil mois¬ 
ture was recorded in the 
first foot: 
May. 
19 
31 
31 
8 
June. 
3oac 
17 
10 
30C 
2 
22C 
3oac 
23 
July. 
7 
18c 
2 
0 
13 
8 
11 
14 
0 
August. 
24 
22c 
6 
12 
0 
0 
3iac 
2 
Number of days during 
which available soil mois¬ 
ture was recorded in sec¬ 
ond-foot: 
May. 
0 
31 
31 
31 
June. 
3©ac 
23 
0 
30 C 
0 
30c 
3oac 
30 
July. 
19c 
0 
0 
23 
0 
14 
30 
23 
August. 
0 
oc 
0 
0 
0 
0 
3oac 
0 
a +— Record incomplete; &=* Agaricus tabular is; c=« Calvatia cyathiformis in fruit at sometime during the 
month. 
