Hackpen Hill

Location:England, United Kingdom
Area:89 acres (36 hectares)
Species:All  Endangered  Invasive
Website:View website
Land Use:View Land Use Data
Köppen climate classification:Cfb (Climate: warm temperate; Precipitation: fully humid; Temperature: warm summer)
Natura 2000 Data Sheet:View Data Sheet  Explanatory notes

Ecoregions

English Lowlands beech forests

Soils

Link to Map
Protected Area Boundary
 A
  
Share50 %25 %20 %5 %
Soil TypeRendzic LeptosolsEutric CambisolsHaplic LuvisolsCalcaric Regosols
Topsoil TextureMediumMediumMediumMedium
Reference Depth30 cm100 cm100 cm100 cm
DrainageImperfectlyImperfectlyModerately wellImperfectly
Available Water Capacity50 mm50 m150 m50 m
Phase 1 Lithic Lithic
Root Obstacle 40 - 60 cmNone to 80 cmNone to 80 cm
Impermeable Layer None to 150 cmNone to 150 cmNone to 150 cm
Soil Water Regime Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 monthNot wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 monthNot wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month
Topsoil Properties
Gravel16 %9 %4 %14 %
Sand37 %42 %41 %44 %
Silt44 %36 %37 %35 %
Clay19 %22 %22 %21 %
USDA TextureLoamLoamLoamLoam
Reference Bulk Density1.41 g/cm³1.4 g/cm³1.4 g/cm³1.41 g/cm³
Bulk Density1.24 g/cm³1.37 g/cm³1.43 g/cm³1.37 g/cm³
Organic Carbon2.13 %1 %0.74 %0.75 %
PH7.56.66.58
Clay Cation Exchange Capacity80 cmol kg⁻¹55 cmol kg⁻¹47 cmol kg⁻¹45 cmol kg⁻¹
Soil Cation Exchange Capacity27 cmol kg⁻¹16 cmol kg⁻¹13 cmol kg⁻¹17 cmol kg⁻¹
Base Saturation100 %93 %91 %100 %
Total Exchangeable Bases28.8 cmol kg⁻¹14 cmol kg⁻¹11 cmol kg⁻¹26.8 cmol kg⁻¹
Calcium Carbonate6 %0 %0 %15 %
Calcium Sulphate0 %0 %0 %0 %
Exchangeable Sodium2 %2 %1 %2 %
Electrical Conductivity0.1 dS m-10.1 dS m-10.1 dS m-10.2 dS m-1
Subsoil Properties
Gravel 12 %3 %18 %
Sand 41 %37 %40 %
Silt 34 %34 %35 %
Clay 25 %29 %25 %
USDA Texture LoamClay loamLoam
Reference Bulk Density 1.38 g/cm³1.35 g/cm³1.37 g/cm³
Bulk Density 1.39 g/cm³1.51 g/cm³1.5 g/cm³
Organic Carbon 0.37 %0.36 %0.47 %
PH 76.78.1
Clay Cation Exchange Capacity 55 cmol kg⁻¹50 cmol kg⁻¹52 cmol kg⁻¹
Soil Cation Exchange Capacity 15 cmol kg⁻¹14 cmol kg⁻¹15 cmol kg⁻¹
Base Saturation 93 %93 %100 %
Total Exchangeable Bases 15.1 cmol kg⁻¹13.1 cmol kg⁻¹36.5 cmol kg⁻¹
Calcium Carbonate 0.1 %0 %15 %
Calcium Sulphate 0 %0 %0 %
Exchangeable Sodium 2 %1 %2 %
Electrical Conductivity 0.1 dS m-10.1 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.
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