Hubbard Brook Forest Floor Data - Watershed 6 1982 - 68 15x15 cm excavated blocks
Summary

  Forest floor total dry mass (80oC ODW)  ave =  10.90 kg/m2  N=68
  Organic matter dry mass (80oC ODW)      ave =   6.32 kg/m2  N=68
  Sticks and roots dry mass (80oC ODW)    ave =   0.303 kg/m2  N=68



  Average forest floor thickness (cm) =  7.09 cm
  Organic matter % ODW   (LOI)    ave = 57.30 %  N=68
 


Elemental analysis:

(Chemistry was rerun in 1998 for all plots except plot 27, which had 
no sample left in the jar.  For Ca, Mg, K, P, and Mn, N=67 for the averages below.
For Cu, Zn, and Pb, the original data was used for plot 27, so N=68 for the
averages below.)



        Concentration            Amounts
Ca         1616   ug/g            18.01  g/m2
Mg          320   ug/g             3.48  g/m2
K           808   ug/g             8.60  g/m2
P           917   ug/g            10.33  g/m2      
Mn          361   ug/g             4.35  g/m2
Cu            7.5 ug/g             0.08  g/m2      
Zn           46   ug/g             0.51  g/m2
Pb           82   ug/g             0.86  g/m2