766 
Journal of Agricultural Research 
Vol. XXIII, No. 9 
Table IV .—Daily mean dir and soil temperatures and daily rainfallfor Hancock, 1 Wis ., 
June , 1918 and 1919 
Daily mean air tem¬ 
perature for Hancock. 2 * * 
Daily mean soil tem¬ 
perature for Plainfield. 
Daily rainfall for Han¬ 
cock. 
Date. 
1918 
1919 
1918 * 
1919 
1918 
1919 
May 26. 
27 . 
28 . 
29 . 
30 . 
31 . 
June 1. 
2 . 
3 . 
4 . 
5 . 
6 . 
7 . 
8 . 
9 . 
10 . 
11 . 
12 . 
13 . 
14 . 
15 . 
16 . 
17 . 
18 .. 
19 . 
20 . 
21 . 
22 . 
23--. 
24 . 
25 . 
26 . 
27 . 
28 . 
2 9 . 
30 . 
Mean average... 
Total rainfall for June 
’ c. 
0 c. 
i 7 - 5 
20. 8 
18. 0 
20. 8 
12. 2 
20. 8 
8.8 
20. 8 
17. 2 
24. 4 
25.0 
25. 8 
21. 9 
22. 7 
19. 7 
21. 9 
17. 2 
19. 1 
16. 9 
20. 8 
i 9 - 5 
18. 1 
19. 4 
15.8 
I 5 - 0 
17-5 
16.1 
16. 1 
18.6 
20.3 
17. 2 
2 3 -* 
23-9 
22.8 
19.4 
24. 7 
17-7 
25 *3 
19. 7 
24.7 
17. 2 
25-3 
26. 7 
23-9 
23- 1 
24.4 
16. 7 
25-5 
19.7 
26.1 
18. 1 
18.3 
23-3 
14.4 
22. 2 
16. 1 
22. 8 
22. 2 
23.6 
18.5 
24.7 
20.3 
25. 0 
20.3 
20. 0 
21. 1 
14.4 
19.7 
18.3 
18.6 
22. 8 
0 c. 
18.5 
19. o 
13. 2 
9.8 
18.2 
26. o 
22. 9 
20. 7 
18. 2 
17.9 
20. 5 
20. 4 
16. O 
17 . I 
19. 6 
18.2 
24.9 
20. 4 
18.7 
20. 7 
18.2 
27.7 
24. 1 
17.9 
20. 7 
19. 1 
19*3 
15-4 
i 7 - 1 
23. 2 
19*5 
21.3 
21.3 
22.1 
20. 7 
18.6 
0 c. 
Inches. 
Inches. 
20 . 6 
22. O 
22 . 5 
23. I 
24 - 5 
23.2 
21 . 4 
19-5 
19.9 
17.9 
16. 5 
18. 2 
0. 30 
1. 44 
1. 09 
Trace. 
^ *° 5 
Trace. 
.09 
.09 
„ ‘ 43 
Trace. 
.04 
•75 
. 01 
21. 9 
21. 5 
23- 5 
24. 2 
25-7 
26.1 
27-5 
24. 6 
26. 0 
26. 1 
23.8 
24 - 3 
23-7 
22. 5 
22. 8 
23. 1 
25. o 
21-5 
20. 7 
22. o 
.91 
.04 
•34 
. 18 
. 02 
• °9 
Trace. 
Trace. 
1. 00 
*05 
Trace. 
Trace. 
1. 26 
19. 1 
22. o 
20. 1 
23. o 
2.49 
5-69 
1 The soil temperatures were determined and calculated for a depth of 4 inches. 
The nearest weather recording station to Plainfield was at Hancock, Wis., 6 miles southwest. The soil 
and weather conditions at the two places are in general very similar. The average daily mean soil tempera¬ 
ture at a depth of 4 inches at Plainfield during 1919 was found to be just i° C. higher than the average daily 
mean air temperature recorded for the same day at Hancock. Assuming the same relation to hold true for 
1918, a fair index is obtained for calculating both the soil and the air temperature at Plainfield for the season 
of 1918. 
2 The daily air temperatures for Hancock for May and June, 1918 and 1919, were calculated directly from 
the Wisconsin section of the Climatological Data, Weather Bureau, United States Department of Agri¬ 
culture. 
* Calculated. 
In 1919, 35 parallel rows each containing 100 hills were planted as in 
1918. Seven of these rows were planted with untreated seed as controls. 
Plantings were made May 25 and the first observations on July 3, five 
weeks later. At this later date the ravages of the disease were not 
nearly so apparent as in 1918. While the control rows could be detected 
