Site #8: 1987 Fire (Old Growth) Glacial fluvial
July 25/July 27, 1995
L.M. Arocena and K. Driscoll
Depth (cm) Horizon Description 
8-5 Lv  Coniferous needles, twigs, coniferous cones, fungal mycelia. 
5-4 Fa  Moist; dark reddish brown (5YR 2.5/2m); moderate, non-compact matted, friable, fibrous; few, fine roots; few Coleoptera; few, random fungal mycelia. 
4-0 Hh  Moist; very dark brown (7.5YR 2.5/2 m); weak, granular, firm, gritty; common, very fine roots; few Lumbricida; common, random droppings; few, random fungal mycelia. 
0-18 Ae  Gray (7.5YR 6/1 m); sandy loam; moderate, medium, subangular blocky; very friable; abundant, coarse to medium, vertical and abundant, coarse, horizontal and vertical, exped roots; clear, smooth boundary. 
18-48 Bf  Dark brown (7.5YR 3/4 );loam; moderate, fine to medium, subangular blocky; friable; abundant, medium, random, exped roots; gradual, smooth boundary. 
48-56 BC  Dark yellowish brown (10 YR 3/6 m); sandy loam; moderate, medium, subangular blocky; slightly friable; plentiful, fine, medium, vertical, exped roots; clear, smooth boundary. 
56+ C  Brown (7.5 YR 5/4 m); silty clay loam; massive; slightly sticky; very few, fine, vertical, exped roots. 
Selected physical and chemical properties - Pedon 8.
 
HORIZON Sand 
%		 Clay 
%		 Silt 
%		 C 
%		 Ti 
%		 Zr 
ppm		 pH 
dH2O		 pH 
0.01M CaCl2 
Ae  56.7  2.40  40.9  0.58  0.340  207  4.3  3.5 
Bf  63.3  1.80  34.9  2.9  0.307  205  4.6  4 
BC  61.6  2.00  36.4  1.8  0.243  146  4.9  4.2 
C  52.0  8.00  40.0  0.37  0.287  142  5.2  4.3 
 
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  1.0  < 0.011  0.065  0.16  0.012  0.0090  2.3 
Bf  0.012  1.8  0.067  0.065  0.11  0.020  0.047  5.2 
BC  0.40  0.60  0.011  < 0.005  0.061  0.0090  0.018  3.0 
C  0.18  0.41  < 0.011  0.026  0.094  < 0.007  0.013  1.4 
 
HORIZON Alp 
%		 Fep 
%		 Alo 
%		 Feo 
%		 ODOE* 
Ae  0.0020  0.0080  0.0090  0.016  0.24 
Bf  0.12  0.53  0.24  0.77  2.9 
BC  0.18  0.12  0.43  0.23  1.6 
C  0.061  0.046  0.10 
o = (NH4)2C2O4      p = Na4P2O7      * = optical density of oxalate extract 

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