Ponderosa pine forest in Sierra mountains. Fairly steep topography 100-150 m from site. Small stream runs through northern part of footprint 100 m from probe. Spatially variable pine needle (0-10 cm thick) and organic layer (0-5 cm) make up top portion of soil column. Underlying soil dark brown and fairly uniform. At deep some white rocky highly weathered material. Bedrock found 1-2 m deep around site. http://www.ess.uci.edu/~california/