Arsenic Toxicity Studies— Clements and Munson 
165 
TABLE 9. SUDAN GRASS-RED SOIL 
Yield Data and Arsenic Content of Tissues. 
CAN 
NUMBER 
AS 2 O 3 
CONTENT 
OF SOIL 
SERIES I 
AVERAGE OF 2 
LATER SERIES 
Green weight 
of plants 
As 2 Os content 
of tissues 
Green weight 
of plants 
As 2 0 3 content 
of tissues 
ppm 
gm. per can 
ppm 
gm. per can 
ppm 
1 
15 
20.8 
0.5 
15.7 
1.5 
2 
25 
19.0 
1.6 
15.7 
1.5 
3 
34 
18.7 
0.8 
15.5 
1.3 
4 
45 
19.0 
1.6 
15.1 
1.6 
5 
54 
19.0 
1.3 
16.0 
1.3 
6 
65 
18.3 
2.6 
15.8 
3.8 
7 
74 - 
18.7 
4.5 
15.6 
2.4 
8 
85 
20.0 
2.1 
16.3 
3.0 
9 
95 
19.7 
2.6 
14.8 
3.7 
10 
104 
18.3 
16.6 
2.9 
11 
115 
17.3 
4.0 
11.9 
3.6 
12 
214 
12.7 
8.2 
11.9 
4.6 
13 
314 
11.3 
10.3 
12.2 
6.5 
14 
414 
8.7 
14.5 
6.1 
6.3 
15 
514 
4.7 
23.2 
6.3 
12.3 
16 
614 
2.2 
31.4 
4.9 
14.1 
17 
714 
0.3 
1.7 
21.8 
18 
814 
0.6 
1.0 
35.5 
19 
915 
0.2 
0.9 
28.1 
20 
1014 
0.2 
0.8 
46.1 
21 
1514 
0.1 
0.4 
22 
2014 
0.2 
23 
2515 
0.2 
24 
3014 
0.1 
TABLE 10. SUDAN GRASS-BLACK SOIL 
Yield Data and Arsenic Content of Tissues. 
CAN 
NUMBER 
As 2 Oa 
CONTENT 
OF SOIL 
SERIES I 
AVERAGE OF 5 
LATER SERIES 
Green weight 
of plants 
As 2 C>3 content 
of tissues 
Green weight 
of plants 
As 2 0 3 content 
of tissues 
ppm 
gm. per can 
ppm 
gm. per can 
ppm 
1 
15 
25.3 
2.4 
36.8 
1.3 
2 
25 
22.6 
5.5 
33.2 
1.2 
3 
34 
23.8 
5.0 
31.6 
1.8 
4 
45 
25.8 
4.2 
32.4 
1.6 
5 
54 
23.2 
3.4 
33.6 
1.2 
6 
65 
24.6 
3.4 
32.8 
2.2 
7 
74 
27.3 
34.5 
1.3 
8 
85 
25.8 
3.7 
31.1 
1.6 
9 
95 
25.2 
1.3 
34.1 
2.1 
10 
104 
24.6 
3.4 
34.9 
2.1 
11 
115 
22.7 
5.8 
36.3 
2.4 
12 
214 
26.4 
2.1 
34.3 
5.4 
13 
314 
25.6 
0.4 
29.6 
7.7 
14 
414 
20.5 
9.2 
30.0 
10.7 
15 
514 
17.7 
16.1 
27.4 
13.5 
16 
614 
23.7 
14.0 
29.0 
12.9 
17 
714 
13.5 
18.5 
27.1 
17.6 
18 
814 
10.5 
17.4 
24.6 
17.4 
19 
915 
6.8 
16.1 
24.4 
24.6 
20 
1014 
10.9 
24.0 
17.6 
27.3 
21 
1514 
4.8 
28.5 
10.4 
29.4 
22 
2014 
0.9 
44.6 
2.4 
56.1 
23 
2515 
0.1 
1.0 
86.5 
24 
3014 
0.2 
0.7 
