Profile Number:  50    Series: SOIL FROM ANDESITE COLLUVIUM  

Location: ABOVE UPPER TRAIL WS 2, NEAR WS 2-3 DIVIDE, H.J. ANDREWS E.F.

Classification: TYPIC HAPLUMBREPTS, LOAMY-SKELETAL, MIXED, MESIC            
         Slope: 50 %
        Aspect: NW 
     Elevation: 2750 ft.
      Landform: UNEVEN SLOPE                  
      Drainage: WELL DRAINED                  
   Parent Mat.: ANDESITE COLLUVIUM                                                              
    Vegetation: TSHE/RHMA/GASH ASSOCIATION                                  
   Description: DYRNESS- SAMPLED PROFILE 50 6-65           

   (Physical and chemical data listed below profile description)

A1  0 - 4 in.       Very dark brown (7.5YR2/2) when moist 
                    gravelly loam; weak, fine to medium granular 
                    structure; very friable when moist, slightly 
                    sticky and nonplastic when wet; 35% andesite 
                    (mostly gravel); abundant  roots; gradual and 
                    wavy boundary.

AC  4 - 10 in.      Very dark brown (7.5YR2/2) when moist 
                    gravelly loam; weak, medium granular 
                    structure; very friable when moist, slightly 
                    sticky and nonplastic when wet; 25% gravel, 
                    15% larger stones; abundant  roots; gradual 
                    and wavy boundary.

C1  10 - 24 in.     Dark brown (7.5YR3/2) when moist gravelly 
                    loam; weak, fine granular structure; loose 
                    when moist, slightly sticky and nonplastic 
                    when wet; 25% gravel, 10% larger stones, 
                    occasional pumice; clear and irregular 
                    boundary.

C2  24 - 50+ in.    Dark brown (7.5YR3/4) when moist gravelly 
                    sandy loam; single grain structure; loose 
                    when moist, slightly sticky and nonplastic 
                    when wet; 35% gravel, 15% larger stones, 
                    common pumice.


Physical Profile Data

-----------------------------------------------------------------------------------------
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 - 4           49.0  35.3  15.7                32.3     26.3    20.0    17.8
  AC     4 - 10          53.4  30.4  16.2                29.1     26.1    19.3    17.2
  C1    10 - 24          48.9  34.4  16.7                26.5     23.8    18.8    18.1
  C2    24 - 50+         61.4  25.2  13.4                26.3     23.6    20.4    16.8
-----------------------------------------------------------------------------------------

Chemical Profile Data

-----------------------------------------------------------------------------------------
Horizon  Depth     Ph     O.M. Total N    P     CEC    K     Ca    Mg    Na    Base Sat.   
          (in)            (%)    (%)    (ppm)  --------------  meq/100g ----------------- 
-----------------------------------------------------------------------------------------
  A1     0 - 4     5.1                                                            
  AC     4 - 10    5.2                                                            
  C1    10 - 24    5.9                                                            
  C2    24 - 50+   5.6                                                            
-----------------------------------------------------------------------------------------