Organ Pipe Cactus Biosphere Reserve

Location:Arizona, United States
Area:327,376 acres (132,485 hectares)
Species:All  Endangered  Invasive
Map:View Google Map
Climate:View Climate Data
Land Use:View Land Use Data

Ecoregions

Sonoran desert

Soils

Link to Map
Protected Area Boundary
 A
  
Share30 %30 %20 %20 %
Soil TypeLuvic YermosolsLuvic YermosolsCalcic YermosolsCalcaric Regosols
Topsoil TextureCoarseMediumMediumMedium
Reference Depth100 cm100 cm100 cm100 cm
DrainageModerately wellModerately wellModerately wellModerately well
Available Water Capacity150 m150 m150 m150 m
Topsoil Properties
Gravel4 %20 %20 %17 %
Sand79 %50 %39 %43 %
Silt10 %29 %37 %35 %
Clay11 %21 %24 %22 %
USDA TextureSandy loamLoamLoamLoam
Reference Bulk Density1.57 g/cm³1.42 g/cm³1.38 g/cm³1.4 g/cm³
Bulk Density1.66 g/cm³1.5 g/cm³1.46 g/cm³1.4 g/cm³
Organic Carbon0.34 %0.4 %0.37 %0.77 %
PH8.27.38.18
Clay Cation Exchange Capacity52 cmol kg⁻¹47 cmol kg⁻¹45 cmol kg⁻¹40 cmol kg⁻¹
Soil Cation Exchange Capacity8 cmol kg⁻¹7 cmol kg⁻¹15 cmol kg⁻¹17 cmol kg⁻¹
Base Saturation100 %100 %100 %100 %
Total Exchangeable Bases6.8 cmol kg⁻¹14 cmol kg⁻¹24 cmol kg⁻¹31.1 cmol kg⁻¹
Calcium Carbonate2.2 %0.5 %26 %15 %
Calcium Sulphate0.1 %0.1 %0.1 %0 %
Exchangeable Sodium5 %6 %8 %2 %
Electrical Conductivity0.2 dS m-10.1 dS m-12.4 dS m-10.3 dS m-1
Subsoil Properties
Gravel5 %27 %41 %18 %
Sand65 %44 %30 %38 %
Silt14 %28 %42 %36 %
Clay21 %28 %28 %26 %
USDA TextureSandy clay loamClay loamClay loamLoam
Reference Bulk Density1.45 g/cm³1.37 g/cm³1.34 g/cm³1.36 g/cm³
Bulk Density1.63 g/cm³1.47 g/cm³1.3 g/cm³1.52 g/cm³
Organic Carbon0.24 %0.28 %0.29 %0.53 %
PH8.37.38.18.1
Clay Cation Exchange Capacity45 cmol kg⁻¹58 cmol kg⁻¹35 cmol kg⁻¹50 cmol kg⁻¹
Soil Cation Exchange Capacity9 cmol kg⁻¹11 cmol kg⁻¹11 cmol kg⁻¹15 cmol kg⁻¹
Base Saturation100 %100 %100 %100 %
Total Exchangeable Bases8.4 cmol kg⁻¹14.6 cmol kg⁻¹21.8 cmol kg⁻¹41.1 cmol kg⁻¹
Calcium Carbonate11.4 %3.8 %35 %15 %
Calcium Sulphate0.9 %0.7 %0.7 %0 %
Exchangeable Sodium3 %4 %8 %1 %
Electrical Conductivity0.2 dS m-19.7 dS m-12.6 dS m-10.3 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.