342 
Journal of Agricultural Research 
Vol. XXXI, No. 4 
Table IX .—Penetration of mercury in mercuric chloride +sodium chloride solu¬ 
tions in Leonardtown silt loam. Average penetration ( inches ) at different per¬ 
centages of soil moisture of applications totaling 1 gallon per square foot 
In soil containing 1.3 to 4.3 per cent moisture 
Proportions of solu¬ 
tion and water 
1 day 
2 days 
3 days 
4 days 
5 days 
6 days 
7 days 
12 days 
Number 
of tubes 
1+0“.. 
Inches 
Inches 
6- 
7- 
Inches 
Inches 
Inches 
6+ 
7- 
6 to 7 
6+ 
Inches 
Inches 
Inches 
6 
33 
6 
1-j-l_ 
7+ 
7- 
5 to 6 
8 
8 to 9 
1+3 .. 
1+7 
6 
1 
In soil containing 8 to 15 per cent moisture 
1+0 . __ 
7— 
7+ 
8- 
8 
8- 
12 
1+1.. _ 
8 
7 to 8 
8+ 
8+ 
8 to 9 
8 to 9 
42 
1+3. __ 
8 to 9 
8— 
8+ 
8 to 9 
8 to 9 
8 to 9 
24 
1+7_ 
8- 
8- 
8+ 
8- 
8+ 
8 to 9 
24 
In soil containing 15 to 21 per cent moisture 
1+0 ~ 
8 to 9 
8 to 9 
+ 05 
00 
8 to 9 
12 
1+1_ 
9- 
9 
9- 
9- 
8- 
75 
1+3 
9— 
8 to 9 
8 to 9 
8+ 
12 
1+7__ 
8 to 9 
8 to 9 
8- 
8+ 
12 
In soil containing 43 per cent moisture 
1+1 
10+ 
11 to 12 
11— 
10- 
11 
1+3. 
11— 
11 to 12 
12— 
12- 
12 
l+7„ ... . __ 
12 to 13 
11+ 
12— 
12 to 13 
11 
1 
SUMMARY h 
Moisture in soil 
(per cent) 
1 day 
2 days 
3 days 
4 days 
5 days 
6 days 
7 days 
12 days 
Number 
of tubes 
1 to 4 
6+ 
7— 
8- 
6+ 
8 
51 
8 to 15 
7+ 
8— 
7+ 
8+ 
8+ 
8+ 
8- 
102 
15to2i .. _ 
8+ 
8+ 
8+ 
9- 
8+ 
8- 
8- 
111 
43 
11 
11+ 
11+ 
11+ 
34 
Total 
298 
• See “How solutions were applied,” p. 332, and footnote of Table VII. 
*> This combines the data contained under 1.3 to 4.3, 8 to 15,15 to 21, and 43 per cent moisture. 
there did not seem to be any real change in the depth of penetration 
as the percentage of moisture increased from 15 to 21 per cent. In 
the case of the Manor loam the soil containing 20 to 23 per cent had 
reached or exceeded the moisture equivalent percentage (20.1 per 
cent) for that soil, whereas in the Leonardtown silt loam the moisture 
equivalent is 23.8 per cent, or somewhat higher than the maximum 
moisture in the 15 to 21 per cent group of tubes. It has been sug¬ 
gested that there may be some correlation between the moisture 
equivalent and the penetration obtained. This has not been investi¬ 
gated. The only tests of Leonardtown silt loam containing more 
than the moisture equivalent were the tubes containing 43 per cent 
of moisture. These tubes were set in 8 inches of water for two days 
and then drained a short time (part of one day) before being treated. 
