Site #10: Middle Aged Glacial till
July 27, 1995
L.M. Arocena and K. Driscoll
Depth (cm) Horizon Description 
6-3 Lv  Coniferous needles, twigs, deciduous leaves, Englemann Spruce cones. 
3-1 Fm  Moist; very dark brown (7.5YR 2.5/2 m); moderate, compact matted, friable, fibrous; common, very fine roots; few, random fungal mycelia. 
1-0 Hh  Moist; very dark brown (10YR 2/2 m); moderate, compact matted, friable, greasy; common, very fine roots; few, random fungal mycelia. 
0-8 Ae  Grayish brown (10YR 5/2 m); silt loam; weak to moderate, medium, subangular blocky; slightly friable; plentiful, medium, vertical, exped roots; charcoal fragments; gradual, wavy boundary. 
(8-13) AB (discontinuous) Brown (10YR 5/3 m); silty clay loam; strong, medium, subangular blocky; friable; plentiful, medium to coarse, vertical, exped roots; gradual, smooth boundary. 
13-34 Bt  Dark yellowish brown (10YR 3/4 m); silty clay loam; moderate, medium, subangular blocky; friable; plentiful, medium and coarse, vertical, exped roots; clear, smooth boundary. 
34+ Cg  Olive brown (2.5 Y 4/4 m); silt loam; few, medium to coarse, distinct, dark reddish brown (5YR 3/4 m) mottles; massive; slightly friable. 
Selected physical and chemical properties - Pedon 10.
 
HORIZON Sand
%		 Clay
%		 Silt
%		 C
%		 Ti
%		 Zr
ppm		 pH
dH2O		 pH
0.01M CaCl2 
Ae  28.9  6.60  64.5  0.88  0.555  178  4.5  3.8 
AB  30.0  10.0  60.0  0.74  0.482  169  4.6  3.9 
Bfj  41.7  7.40  50.9  0.75  0.355  134  4.8  4 
C  37.9  6.00  56.1  1.0  0.301  129  5.1  4.2 
 
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  2.8  < 0.011  < 0.005  0.64  < 0.007  0.014  5.3 
AB  0.016  2.2  < 0.011  0.12  0.68  < 0.007  0.028  5.8 
Bfj  0.097  2.0  0.033  0.098  0.83  < 0.007  0.047  7.1 
C  0.33  0.50  0.020  0.031  0.21  0.0090  0.021  2.4  32 
 
HORIZON Alp
%		 Fep
%		 Alo
%		 Feo
%		 ODOE* 
Ae  0.007  0.025  0.019  0.035  0.34 
AB  0.014  0.051  0.031  0.084  0.33 
Bfj  0.097  0.35  0.17  0.37  1.5 
C  0.089  0.097  0.20  0.13  0.54 

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

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