Portholme

Location:England, United Kingdom
Area:227 acres (92 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

Protected Area Boundary
 A
  
Share60 %15 %10 %10 %5 %
Soil TypeHaplic LuvisolsEutric CambisolsGleyic LuvisolsChromic LuvisolsEutric Fluvisols
Topsoil TextureMediumMediumMediumMediumFine
Reference Depth100 cm100 cm100 cm100 cm100 cm
DrainageModerately wellModerately wellPoorModerately wellVery poor
Available Water Capacity150 m150 m150 m150 m150 m
Root ObstacleNone to 80 cmNone to 80 cmNone to 80 cmNone to 80 cmNone to 80 cm
Impermeable LayerNone to 150 cmNone to 150 cmNone to 150 cmNone to 150 cmNone to 150 cm
Soil Water RegimeNot 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 monthWet within 80 cm for 3 to 6 months, but not wet within 40 cm for over 1 monthNot wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 monthWet within 80 cm over 6 months, but not wet within 40 cm for over 11 month
Topsoil Properties
Gravel4 %9 %5 %12 %4 %
Sand41 %42 %47 %48 %19 %
Silt37 %36 %29 %28 %32 %
Clay22 %22 %24 %24 %49 %
USDA TextureLoamLoamLoamLoamClay
Reference Bulk Density1.4 g/cm³1.4 g/cm³1.39 g/cm³1.4 g/cm³1.24 g/cm³
Bulk Density1.43 g/cm³1.37 g/cm³1.54 g/cm³1.53 g/cm³1.27 g/cm³
Organic Carbon0.74 %1 %0.83 %0.83 %1.19 %
PH6.56.66.36.36.2
Clay Cation Exchange Capacity47 cmol kg⁻¹55 cmol kg⁻¹46 cmol kg⁻¹39 cmol kg⁻¹38 cmol kg⁻¹
Soil Cation Exchange Capacity13 cmol kg⁻¹16 cmol kg⁻¹16 cmol kg⁻¹12 cmol kg⁻¹24 cmol kg⁻¹
Base Saturation91 %93 %93 %88 %91 %
Total Exchangeable Bases11 cmol kg⁻¹14 cmol kg⁻¹14.9 cmol kg⁻¹10 cmol kg⁻¹22.7 cmol kg⁻¹
Calcium Carbonate0 %0 %0 %0 %0 %
Calcium Sulphate0 %0 %0 %0 %0 %
Exchangeable Sodium1 %2 %2 %1 %1 %
Electrical Conductivity0.1 dS m-10.1 dS m-10.1 dS m-10.1 dS m-10.1 dS m-1
Subsoil Properties
Gravel3 %12 %6 %8 %3 %
Sand37 %41 %39 %41 %21 %
Silt34 %34 %27 %25 %32 %
Clay29 %25 %34 %34 %47 %
USDA TextureClay loamLoamClay loamClay loamClay
Reference Bulk Density1.35 g/cm³1.38 g/cm³1.33 g/cm³1.33 g/cm³1.24 g/cm³
Bulk Density1.51 g/cm³1.39 g/cm³1.65 g/cm³1.51 g/cm³1.39 g/cm³
Organic Carbon0.36 %0.37 %0.28 %0.4 %0.55 %
PH6.7776.46.8
Clay Cation Exchange Capacity50 cmol kg⁻¹55 cmol kg⁻¹44 cmol kg⁻¹41 cmol kg⁻¹41 cmol kg⁻¹
Soil Cation Exchange Capacity14 cmol kg⁻¹15 cmol kg⁻¹16 cmol kg⁻¹15 cmol kg⁻¹20 cmol kg⁻¹
Base Saturation93 %93 %99 %90 %99 %
Total Exchangeable Bases13.1 cmol kg⁻¹15.1 cmol kg⁻¹15.9 cmol kg⁻¹12 cmol kg⁻¹18.2 cmol kg⁻¹
Calcium Carbonate0 %0.1 %0.4 %0 %0.2 %
Calcium Sulphate0 %0 %0 %0 %0 %
Exchangeable Sodium1 %2 %2 %1 %2 %
Electrical Conductivity0.1 dS m-10.1 dS m-10.1 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