Hubbard Brook Forest Floor Data - Watershed 1 1998 - 97 15x15 cm excavated blocks
Summary

  Oie total dry mass (80oC ODW) ave =   3.85 kg/m2  N=97
  Oa  total dry mass (80oC ODW) ave =  10.95 kg/m2   
  total dry mass (80oC ODW)      ave = 14.80 kg/m2



  Oie Organic matter dry mass (80oC ODW) ave =   3.20 kg/m2  N=97
  Oa  Organic matter dry mass (80oC ODW) ave =   5.50 kg/m2
  total organic matter dry mass(80oC ODW) ave =  8.70 kg/m2



  Oie sticks and roots dry mass (80oC ODW) ave = 0.13 kg/m2  N=97
  Oa sticks and roots dry mass (80oC ODW) ave = 0.97 kg/m2
  total sticks and roots dry mass (80oC ODW) ave = 1.10 kg/m2



  Average Oie thickness (cm) =  3.7 cm
  Average Oa thickness (cm) =   4.3 cm
  Average total forest floor thickness (cm) =  8.0 cm



  Organic matter % ODW 
          
     LOI for Oie              ave =  82.58 %   N=96
     LOI for Oa               ave =  51.49 %   N=90



Elemental analysis

  (For "Concentration" averages, N=96 for Oie and 
   N=90 for Oa--we are not including zeroes for 1 plot with no Oie
   and 7 plots with no Oa.  For "Amounts" averages, N=97):



Oie 
        Concentration              Amounts
Ca          3914  ug/g           14.21   g/m2
Mg           439  ug/g            1.61   g/m2
K            880  ug/g            3.21   g/m2
P            910  ug/g            3.42   g/m2
Mn           432  ug/g            1.51   g/m2
Cu            10  ug/g              41  mg/m2
Zn            79  ug/g             298  mg/m2
Pb            44  ug/g             180  mg/m2



Oa 
        Concentration              Amounts
Ca          1011  ug/g            8.78   g/m2
Mg           267  ug/g            3.32   g/m2
K            655  ug/g            7.27   g/m2
P            786  ug/g            9.21   g/m2
Mn           172  ug/g            3.83   g/m2
Cu             6  ug/g              59  mg/m2
Zn            36  ug/g             341  mg/m2
Pb            74  ug/g             636  mg/m2