Chemistry of freely-draining soil solutions at the Hubbard Brook Experimental Forest, Watershed 6, 1982 - present

Tension-free lysimeters were installed in three soil horizons at three
locations adjacent to Hubbard Brook Experiment Forest Watershed 6.
At each location lysimeters were placed beneath the Oa horizon and within the upper and lower B horizon. Soil solution samples were collected approximately monthly and analyzed for pH, acid neutralizing capacity (ANC), base cations, soluble anions, trace metals, nitrogen and carbon.

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.

无张力渗析仪（Tension-free lysimeters）安装于哈伯德布鲁克实验林6号流域附近三个地点的三个土壤层中。

在每个地点，渗析仪分别置于Oa层下方、B层上部及下部。土壤溶液样本约每月采集一次，分析指标包括pH值、酸中和容量（acid neutralizing capacity, ANC）、碱基阳离子、可溶性阴离子、痕量金属、氮及碳。

这些数据是哈伯德布鲁克生态系统研究（Hubbard Brook Ecosystem Study, HBES）的一部分。HBES是哈伯德布鲁克实验林开展的一项合作研究，该实验林由美国农业部林务局北方研究站（USDA Forest Service, Northern Research Station）运营和维护。