Site #5: 1987 Fire Glacial fluvial
S-facing; crest of the slope
July 20, 1995
L.M. Arocena and K. Driscoll
Depth (cm) Horizon Description 
7-6 Lv  Twigs, deciduous leaves, coniferous needles. 
6-0 Hr  Moist; black (10YR 2/1 m); weak, granular, firm, greasy; abundant, fine roots; few Myriapoda; few, random droppings. 
0-15 Ae  Grayish brown (10YR 5/2 m); sandy loam; single grain; loose; coarse fragments (~ 3-15 cm diameter); abundant, coarse, horizontal and vertical, exped roots (tree); clear, wavy boundary. 
15-35 Bt1  Dark brown (7.5YR 3/4 m);loam; strong, fine to medium, subangular blocky; friable; plentiful, medium to coarse, horizontal and plentiful, fine, horizontal and vertical, exped roots (herbaceous); clear, wavy boundary. 
35-55 Bt2  Strong brown (7.5YR 4/6 m); sandy loam; moderate, fine to medium, subangular blocky; friable; plentiful, medium, vertical, exped roots; gradual, wavy boundary. 
55-69 BC  Dark brown (10YR 3/3 m); loamy sand; moderate, medium, subangular blocky; slightly friable; plentiful, fine to medium, vertical, exped roots; gradual, smooth boundary. 
69+ C  Olive brown (2.5Y 4/4 m); sand; massive; slightly hard; many, fine to medium, vertical, exped roots. 
 
 

Selected physical and chemical properties - Pedon 5
HORIZON Sand
%		 Clay
%		 Silt
%		 C
%		 Ti
%		 Zr
ppm		 pH
dH2O		 pH
0.01M CaCl2 
Ae  59.8 5.00 35.2 1.1 0.366 119  5.3 4.5 
Bt1 54.6 12.6 32.8 4.5 0.422 131  4.7 4.1 
Bt2 57.7 10.4 31.9 4.2 0.354 112  5.3 4.6 
BC  71.8 5.90 22.3 4.1 0.299 97.2 6.2 5.2 
C  75.7 6.40 17.9 1.4 0.214 85.4 6.4 5.2 
 
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  0.022 4.6 0.011 0.11 1.9 0.011 0.013 7.9 
Bt1 0.15  1.9 0.044 0.18 1.6 0.011 0.026 9.9 
Bt2 0.41  3.5 0.023 0.10 1.3 0.015 0.033 7.6 
BC  0.048 5.3 0.011 0.038 0.99 0.007 0.020 6.6 
C  0.022 4.2 0.011 0.010 0.94 0.007 0.014 4.7 
 
HORIZON Alp
%		 Fep
%		 Alo
%		 Feo
%		 ODOE* 
Ae  0.0050 0.0080 0.013 0.012 0.50 
Bt1 0.260  0.63  0.45  0.56  3.2 
Bt2 0.467  0.65  0.68  0.21  3.0 
BC  0.289  0.19  0.48  0.084 2.4 
C  0.070  0.059  0.099 0.037 0.43 

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

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