Site #3: 1942 Fire Glacial-till
July 19, 1995
L.M. Arocena and K. Driscoll
Depth (cm) Horizon Description 
6-4 Ln  Deciduous leaves, coniferous needles, bryophytes, twigs, fungal mycelia. 
4-2 Fa  Moist; (black (10YR 2/1 m); moderate compact matted, friable, mushy; few, fine roots; common, random fungal mycelia. 
2-0 Hh  Moist; black (10YR 2/1 m); strong, compact matted, friable, mushy; common, very fine roots; abundant, random fungal mycelia. 
0-10 Ae  Dark gray (10YR 4/1 m); loamy sand; moderate, medium, subangular blocky breaking into single grain; friable; abundant, medium to coarse, vertical, exped rooots; clear, smooth boundary. 
10-24 Bf1  Dark yellowish brown (10YR 4/6 m); loamy sand; moderate to strong, fine, subangular blocky breaking into single grain; friable; plentiful, medium to corase, vertical, exped roots; clear, smooth boundary. 
24-34 Bf2  Dark yellowish brown (10YR 3/4 m); sand; single grain; loose; few, fine to medium, vertical, exped roots; gradual, smooth boundary. 
34-46 BC  Olive brown (2.5 Y 4/4 m); sand; single grain; loose; very few, fine to medium, vertical, exped roots; gradual, smooth boundary. 
46+ C  Dark yellowish brown (10YR 3/4 m); single grain; loose; very few, vertical, exped roots. 
Selected physical and chemical properties - Pedon 3.
 
HORIZON Sand
%		 Clay
%		 Silt
%		 C
%		 Ti
%		 Zr
ppm		 pH
dH2O		 pH
0.01M CaCl2 
Ae 67.6 6.40 26.0 2.6 0.574 183 4.4 3.6 
Bf1 69.1 6.60 24.4 3.5 0.486 144 4.7 4 
Bf2 95.8 1.00 3.18 2.7 0.355 82.8 5.1 4.3 
BC  97.5 0.700 1.76 3.1 0.361 125 5.2 4.5 
C  94.8 0.800 4.41 1.7 0.338 79.3 5.3 4.5 
 
HORIZON By NH4OAc By NH4Cl 
Al
cmol(+)kg-1		 Ca
cmol(+)kg-1		 Fe
cmol(+)kg-1		 K
cmol(+)kg-1		 Mg
cmol(+)kg-1		 Mn
cmol(+)kg-1		 Na
cmol(+)kg-1 		 CEC
cmol(+)kg-1 
Ae  0.31  0.82  0.041  0.14  0.42  0.063  0.029  8.0 
Bf1  0.55  0.33  0.049  < 0.005  0.18  0.015  0.019  4.9 
Bf2  0.43  0.14  0.028  0.025  0.044  < 0.007  0.017  1.9 
BC  0.24  0.10  < 0.011  0.15  0.021  < 0.007  0.036  1.3 
C  0.34  0.11  < 0.011  < 0.005  0.018  < 0.007  0.013  2.0 
 
HORIZON Alp
%		 Fep
%		 Alo
%		 Feo
%		 ODOE* 
Ae  0.065  0.15  0.11  0.26  1.8 
Bf1  0.21  0.33  0.44  0.35  2.2 
Bf2  0.11  0.093  0.51  0.16  1.7 
BC  0.098  0.063  0.55  0.13  1.6 
C  0.13  0.088  0.46  0.13  1.0 

o = (NH4)2C2O4      p = Na4P2O7      * = optical density of oxalate extract 

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