Hubbard Brook Forest Floor Data - Watershed 1 2000 - 100 15x15 cm excavated blocks
Summary

  Oie total dry mass (80oC ODW) ave =   4.61 kg/m2  N=100
  Oa  total dry mass (80oC ODW) ave =  10.85 kg/m2
  total dry mass (80oC ODW)      ave = 15.46 kg/m2



  Oie Organic matter dry mass (80oC ODW) ave =   3.40 kg/m2  N=100
  Oa  Organic matter dry mass (80oC ODW) ave =   4.90 kg/m2
  total organic matter dry mass(80oC ODW) ave =  8.30 kg/m2



  Oie sticks and roots dry mass (80oC ODW) ave = 0.25 kg/m2  N=100
  Oa sticks and roots dry mass (80oC ODW) ave =  0.90 kg/m2
  total sticks and roots dry mass (80oC ODW) ave = 1.15 kg/m2



  Average Oie thickness (cm) =  4.3 cm
  Average Oa thickness (cm) =   3.9 cm
  Average total forest floor thickness (cm) =  8.2 cm



  Organic matter % ODW 
          
     LOI for Oie              ave =  73.05 %   N=100
     LOI for Oa               ave =  48.00 %   N=91



Elemental analysis

  (For "Concentration" averages, N=100 for Oie and 
   N=91 for Oa--we are not including zeroes for 9 plots
   with no Oa.  For "Amounts" averages, N=100):



Oie 
        Concentration              Amounts
Ca         23219  ug/g           98.86   g/m2
Mg           378  ug/g            1.68   g/m2
K            668  ug/g            2.99   g/m2
P            771  ug/g            3.50   g/m2
Mn           452  ug/g            1.79   g/m2
Cu             8  ug/g              36  mg/m2
Zn            63  ug/g             286  mg/m2
Pb            38  ug/g             183  mg/m2



Oa 
        Concentration              Amounts
Ca          1305  ug/g           10.80   g/m2
Mg           242  ug/g            2.50   g/m2
K            705  ug/g            7.50   g/m2
P            740  ug/g            7.95   g/m2
Mn           296  ug/g            1.26   g/m2
Cu             4  ug/g              40  mg/m2
Zn            32  ug/g             309  mg/m2
Pb            67  ug/g             624  mg/m2