Friendship Hill National Historic Site

Location:Pennsylvania, United States
IUCN Category:III
Area:697 acres (282 hectares)
Species:All  Endangered  Invasive
Website:View website
Climate:View Climate Data
Land Use:View Land Use Data
Köppen climate classification:Cfb (Climate: warm temperate; Precipitation: fully humid; Temperature: warm summer)


Appalachian mixed mesophytic forests


Protected Area Boundary
Share90 %10 %
Soil TypeOrthic AcrisolsDystric Cambisols
Topsoil TextureMediumMedium
Reference Depth100 cm100 cm
DrainageModerately wellModerately well
Available Water Capacity150 m150 m
Topsoil Properties
Gravel10 %10 %
Sand49 %41 %
Silt27 %39 %
Clay24 %20 %
USDA TextureSandy clay loamLoam
Reference Bulk Density1.4 g/cm³1.41 g/cm³
Bulk Density1.4 g/cm³1.3 g/cm³
Organic Carbon1 %1.45 %
Clay Cation Exchange Capacity16 cmol kg⁻¹30 cmol kg⁻¹
Soil Cation Exchange Capacity7 cmol kg⁻¹12 cmol kg⁻¹
Base Saturation44 %37 %
Total Exchangeable Bases3.5 cmol kg⁻¹4.1 cmol kg⁻¹
Calcium Carbonate0 %0 %
Calcium Sulphate0 %0 %
Exchangeable Sodium1 %1 %
Electrical Conductivity0.1 dS m-10.1 dS m-1
Subsoil Properties
Gravel10 %20 %
Sand40 %45 %
Silt24 %35 %
Clay36 %20 %
USDA TextureClay loamLoam
Reference Bulk Density1.32 g/cm³1.42 g/cm³
Bulk Density1.4 g/cm³1.37 g/cm³
Organic Carbon0.42 %0.5 %
Clay Cation Exchange Capacity14 cmol kg⁻¹36 cmol kg⁻¹
Soil Cation Exchange Capacity6 cmol kg⁻¹9 cmol kg⁻¹
Base Saturation32 %33 %
Total Exchangeable Bases2.3 cmol kg⁻¹2.6 cmol kg⁻¹
Calcium Carbonate0 %0 %
Calcium Sulphate0 %0 %
Exchangeable Sodium2 %1 %
Electrical Conductivity0.1 dS m-10.1 dS m-1
Soil data provided by FAO/IIASA/ISRIC/ISSCAS/JRC, 2012. Harmonized World Soil Database (version 1.2). FAO, Rome, Italy and IIASA, Laxenburg, Austria.
Köppen climate classification provided by Kottek, M., J. Grieser, C. Beck, B. Rudolf, and F. Rubel, 2006: World Map of Köppen-Geiger Climate Classification updated. Meteorol. Z., 15, 259-263