Profile Number:  51    Series: SOIL FROM ANDESITE COLLUVIUM  

Location: NE CORNER OF WS 1, H.J. ANDREWS E.F.

Classification: TYPIC DYSTROCHREPTS, FINE-LOAMY, MIXED, FRIGID              
         Slope: 50 %
        Aspect: S  
     Elevation: 3050 ft.
      Landform: SMOOTH SLOPE                  
      Drainage: WELL DRAINED                  
   Parent Mat.: ANDESITE COLLUVIUM                                                              
    Vegetation: CLEARCUT                                                    
   Description: DYRNESS- SAMPLED PROFILE 51 6-7-66         

   (Physical and chemical data listed below profile description)

O1  1.5 - 0 in.      L and F layers.

A1  0 - 10 in.      Dark  yellowish brown (10YR3/4) when moist 
                    gravelly clay loam; strong, medium granular 
                    structure; firm when moist, slightly sticky 
                    and slightly plastic when wet; 35% fine 
                    gravel, some shot; clear and smooth boundary.

AC  10 - 26 in.     Brown (7.5YR4/4) when moist clay loam; weak, 
                    medium subangular blocky structure; very 
                    friable when moist, slightly sticky and 
                    slightly plastic and smeary when wet; 20% 
                    gravel  and cobbles, common pumice, 
                    occasional charcoal; clear and wavy boundary.

C  26 - 67+ in.     Dark yellowish brown (10YR4/4) when moist 
                    stony silt loam; massive structure; friable 
                    when moist, sticky and slightly plastic when 
                    wet; 25% andesite and breccia, abundant 
                    pumice and charcoal.


Physical Profile Data

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Horizon  Depth  Density  Sand  Silt  Clay  Percolation  Moisture Tension (% H2O, dry wt.)
          (in)   (g/cc)  (%)    (%)  (%)     (in/hr)     1/3 atm  1 atm   5 atm   15 atm
-----------------------------------------------------------------------------------------
  A1     0 - 10          41.3  30.8  27.9                                             
  AC    10 - 26          27.5  41.2  31.3                                             
  C     26 - 67+         18.2  73.8   8.0                                             
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Chemical Profile Data

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Horizon  Depth     Ph     O.M. Total N    P     CEC    K     Ca    Mg    Na    Base Sat.   
          (in)            (%)    (%)    (ppm)  --------------  meq/100g ----------------- 
-----------------------------------------------------------------------------------------
  A1     0 - 10    6.4    5.63                                                    
  AC    10 - 26    6.8    2.35                                                    
  C     26 - 67+   6.8    0.74                                                    
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