Kern River Preserve

Location:California, United States
IUCN Category:Ia
Area:834 acres (338 hectares)
Species:All  Endangered  Invasive
Website:View website
Climate:View Climate Data
Land Use:View Land Use Data
Köppen climate classification:BSk (Climate: arid; Precipitation: steppe; Temperature: cold arid)


California montane chaparral and woodlands


Protected Area Boundary
Share60 %20 %20 %
Soil TypeChromic LuvisolsEutric RegosolsLithosols
Topsoil TextureMediumMediumMedium
Reference Depth100 cm100 cm10 cm
DrainageModerately wellModerately wellImperfectly
Available Water Capacity100 m150 m15 mm
Phase 1Stony  
Topsoil Properties
Gravel9 %27 %26 %
Sand47 %47 %43 %
Silt29 %34 %34 %
Clay24 %19 %23 %
USDA TextureLoamLoamLoam
Reference Bulk Density1.39 g/cm³1.43 g/cm³1.39 g/cm³
Bulk Density1.54 g/cm³1.21 g/cm³1.3 g/cm³
Organic Carbon0.86 %0.97 %1.4 %
Clay Cation Exchange Capacity38 cmol kg⁻¹41 cmol kg⁻¹42 cmol kg⁻¹
Soil Cation Exchange Capacity12 cmol kg⁻¹12 cmol kg⁻¹15 cmol kg⁻¹
Base Saturation89 %79 %100 %
Total Exchangeable Bases10 cmol kg⁻¹15.1 cmol kg⁻¹15.6 cmol kg⁻¹
Calcium Carbonate0 %0 %3.9 %
Calcium Sulphate0 %0 %0 %
Exchangeable Sodium1 %1 %4 %
Electrical Conductivity0.1 dS m-10.1 dS m-10.1 dS m-1
Subsoil Properties
Gravel8 %28 % 
Sand39 %50 % 
Silt27 %32 % 
Clay34 %18 % 
USDA TextureClay loamLoam 
Reference Bulk Density1.33 g/cm³1.44 g/cm³ 
Bulk Density1.52 g/cm³1.46 g/cm³ 
Organic Carbon0.38 %0.4 % 
Clay Cation Exchange Capacity40 cmol kg⁻¹55 cmol kg⁻¹ 
Soil Cation Exchange Capacity15 cmol kg⁻¹11 cmol kg⁻¹ 
Base Saturation93 %85 % 
Total Exchangeable Bases12.3 cmol kg⁻¹10.3 cmol kg⁻¹ 
Calcium Carbonate0 %0.1 % 
Calcium Sulphate0 %0 % 
Exchangeable Sodium1 %2 % 
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