Mass and Chemistry of Organic Horizons and Surface Mineral Soils on Watershed 1 at the Hubbard Brook Experimental Forest, 1996 - present

This data set includes chemistry of O-horizons ("forest
floor") and the 0-10 cm mineral soil layer in Watershed 1 at
Hubbard Book. Calcium in the form of wollastonite (CaSiO3)
was added to Watershed 1 in October 1999. The application
rate was 1028 kg Ca per ha, and the application was
relatively uniform across the watershed. Pre-treatment forest
floor surveys were completed in 1996 and 1998. The first
post-treatment forest floor survey was completed in 2000.
This data set includes mass and thickness data for the
sampled layers. Chemical data include concentrations and
pools of organic matter, C, N, Ca, Mg, K, P, Mn, Fe, Al, Cu,
Pb, and Zn. Soil pH and exchangeable Al, Ca, Mg, K, and H are
also included. Sampling is intended to continue at 4 or 5
year intervals. These data were gathered as part of the Hubbard Brook
Ecosystem Study (HBES). The HBES is a collaborative effort at
the Hubbard Brook Experimental Forest, which is operated and
maintained by the USDA Forest Service, Northern Research
Station.