Site #6: 1987 Fire Glacial fluvial
S-facing; mid slope (2/3 down)
July 20, 1995
L.M. Arocena and K. Driscoll
Depth (cm) Horizon Description 
  S Bryophytes. 
4-3 Ln  Deciduous leaves, twigs. 
3-0 Fm  Moist; black (10YR 2/1 m); weak, compact matted, friable, fibrous; common, very fine roots, common, random fungal mycelia. 
0-20 Ae  Gray (10YR 6/1 m); sandy loam; moderate, fine to coarse, granular; friable; abundant, coarse to medium, horizontal and vertical, exped roots; clear, wavy boundary. 
20-45 Btg  Dark brown (7.5YR 3/3 m);loam; few, medium, distinct, strong brown (7.5YR 5/8 m) mottles; moderate to strong, medium, subangular blocky; slightly friable; plentiful, medium, vertical, exped roots; gradual, wavy boundary. 
45 Cg  Light olive brown (2.5 Y 5/4 m); sandy loam; few, medium, distinct, strong brown (7.5 YR 4/6 m) mottles; massive; slightly friable; very few, fine to medium, vertical, exped roots. 

Selected physical and chemical properties - Pedon 6.
 
HORIZON Sand
%
Clay
%
Silt
%
C
%
Ti
%
Zr
ppm
pH
dH2O
pH
0.01M CaCl2 
Ae  57.9  4.80  37.4  1.4  0.343  177  5.3  4.5 
Btj  51.5  7.20  41.3  2.0  0.346  162  5.5  4.9 
56.4  4.60  39.0  0.62  0.391  162  6.2  5.1 
 
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  4.1  < 0.011  < 0.005  1.4  0.0090  0.016  5.9 
Btj  < 0.022  6.7  < 0.011  0.053  2.3  < 0.007  0.022  8.9 
< 0.022  2.8  < 0.011  0.12  0.87  < 0.007  0.010  3.9 ** 
 
HORIZON Alp
%
Fep
%
Alo
%
Feo
%
ODOE* 
Ae  0.017  0.029  0.036  0.061  0.78 
Bt  0.058  0.25  0.11  0.27  1.6 
0.024  0.052  0.037  0.043  0.29 

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


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