Table 2,
239°240py and “4!am Contents and Ratios for Soils
Used in Soybean Experiment
Soil source
2395240py (nci/g)
2*lam (nCi/g)
239,240py/24 1am
Mean
+
§.E.*
Mean
+ S.E.*
Ratio +
S.E.**
Area 11 B
2.8
+
0.41
0.44
+
0.068
6.5
+
0.17
Area 11C
9.6
+
1.3
1.8
+
0.20
5.3
+
0.17
Area 11 D
4.6
t+
0.24
0.87
+
0.062
5.2
+
0.12
Area 13
6.0
+
0.93
1.1
+
Q.11
5.6
+
0.27
Clean Slate 1
4.3
+
0.57
0.23
+
0.033
19
+
0.33
Clean Slate 2
15
+
3.6
0.72
+
Q.13
21
+
1.9
Clean Slate 3
11
+
1.6
0.59
+
0.073
19
+
0.67
+
0.79
0.28
+
0.033
21
+
0.88
Double Track
5.9
*Standard error of mean - [var./n] 1/2
rst. = [ool gu
2
ey
2
- xi? / (n-1)
UK, la
57
(Snedecor and Cochran, 1967)