B4 evidence
Before Biscuit (1992)
After Biscuit (2003)
1
1
<1
1
1
2
7
67
39
6
102
48
O
B1
A
B2
<1
1
7
2
22
11
5
67
35
5
110
54
Horizon
Organic matter
Mineral
matter
Rocks
(kg/m2)
(kg/m2)
comp2
Initial result:
Changes in of mineral and rock
content of O and A horizons appear large, but this result is misleading because horizons have
changed.
Soil changes as averaged for one stand—with initial
(misleading) conclusions.
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(> 4 mm)