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SUMMARY SOIL DATA FOR FOREIGN SAMPLES
Latitude
Spring
1953
Spring
spring
1956
1958
90°S - 70°S
7O°s - 60°S
60°S - 50°S
50°s - 40°s
1.8
2.5
8.6
4o°’s - 30°S
3.0
3.6
7.8
2.7
6.2
30°S - 20°S
20°S - 10°S
10°S - Equator
9,5
Equator - ]O°N
10°N - 20°N
20°N - 30°N
7
1.2
2.3
3.5
3.4
6.4
6.3
6.4
3
30°N - 40°N
wb:
ho°n - 50°N
3.90
+2.0
20
be
2
50°N- 60°N
60°N - 7O°N
7O°N = 90°N
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