Creighton Ranch Preserve

Location:California, United States
IUCN Category:Ia
Area:3,275 acres (1,325 hectares)
Species:All  Endangered  Invasive
Climate:View Climate Data
Land Use:View Land Use Data
Köppen climate classification:BSk (Climate: arid; Precipitation: steppe; Temperature: cold arid)

Ecoregions

California Central Valley grasslands

Soils

Link to Map
Protected Area Boundary
 A
  
Share60 %30 %10 %
Soil TypeOrthic SolonetzMollic GleysolsEutric Fluvisols
Topsoil TextureMediumMediumMedium
Reference Depth100 cm100 cm100 cm
DrainageModerately wellPoorPoor
Available Water Capacity150 m150 m150 m
Topsoil Properties
Gravel6 %4 %4 %
Sand47 %38 %39 %
Silt28 %40 %41 %
Clay25 %22 %20 %
USDA TextureLoamLoamLoam
Reference Bulk Density1.39 g/cm³1.39 g/cm³1.41 g/cm³
Bulk Density1.53 g/cm³1.28 g/cm³1.36 g/cm³
Organic Carbon0.66 %1.74 %0.9 %
PH8.16.57.3
Clay Cation Exchange Capacity46 cmol kg⁻¹45 cmol kg⁻¹62 cmol kg⁻¹
Soil Cation Exchange Capacity16 cmol kg⁻¹17 cmol kg⁻¹16 cmol kg⁻¹
Base Saturation100 %87 %91 %
Total Exchangeable Bases21.1 cmol kg⁻¹9.9 cmol kg⁻¹16.4 cmol kg⁻¹
Calcium Carbonate5.8 %0 %1 %
Calcium Sulphate0 %0 %0 %
Exchangeable Sodium13 %2 %2 %
Electrical Conductivity0.6 dS m-10.1 dS m-10.1 dS m-1
Subsoil Properties
Gravel8 %3 %8 %
Sand40 %37 %41 %
Silt27 %35 %38 %
Clay33 %28 %21 %
USDA TextureClay loamClay loamLoam
Reference Bulk Density1.33 g/cm³1.35 g/cm³1.4 g/cm³
Bulk Density1.58 g/cm³1.36 g/cm³1.39 g/cm³
Organic Carbon0.29 %0.67 %0.4 %
PH8.577.5
Clay Cation Exchange Capacity57 cmol kg⁻¹44 cmol kg⁻¹58 cmol kg⁻¹
Soil Cation Exchange Capacity19 cmol kg⁻¹14 cmol kg⁻¹14 cmol kg⁻¹
Base Saturation100 %94 %97 %
Total Exchangeable Bases35.7 cmol kg⁻¹11 cmol kg⁻¹15.1 cmol kg⁻¹
Calcium Carbonate7.4 %0.4 %3.9 %
Calcium Sulphate0.1 %0 %0 %
Exchangeable Sodium39 %1 %3 %
Electrical Conductivity2.7 dS m-10.1 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