PLAINE DE VILLEFAGNAN

Location:France
Area:23,552 acres (9,531 hectares)
Species:All  Endangered  Invasive
Climate:View Climate Data
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

Atlantic mixed forests

Soils

Protected Area Boundary
 AB
   
Share50 %30 %20 %50 %30 %20 %
Soil TypeRendzic LeptosolsChromic CambisolsEutric VertisolsChromic CambisolsCalcaric CambisolsLithic Leptosols
Topsoil TextureMediumMediumMediumMediumMediumFine
Reference Depth30 cm100 cm100 cm100 cm100 cm10 cm
DrainageImperfectlyModerately wellPoorModerately wellModerately wellImperfectly
Available Water Capacity15 mm150 m75 m100 m100 m15 mm
Phase 1Stony StonyStonyStonyStony
Root Obstacle 40 - 60 cmNone to 80 cm40 - 60 cm40 - 60 cm 
Impermeable Layer None to 150 cmNone 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 monthNot wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month 
Misc. Property  Vertic (cracks of more than 1 cm wide)   
Topsoil Properties
Gravel16 %10 %7 %10 %6 %17 %
Sand37 %49 %44 %49 %36 %28 %
Silt44 %28 %27 %28 %43 %25 %
Clay19 %23 %29 %23 %21 %47 %
USDA TextureLoamLoamClay loamLoamLoamClay
Reference Bulk Density1.41 g/cm³1.4 g/cm³1.36 g/cm³1.4 g/cm³1.39 g/cm³1.26 g/cm³
Bulk Density1.24 g/cm³1.31 g/cm³1.29 g/cm³1.31 g/cm³1.41 g/cm³1.4 g/cm³
Organic Carbon2.13 %0.98 %1.5 %0.98 %0.65 %2.3 %
PH7.56.66.76.687.5
Clay Cation Exchange Capacity80 cmol kg⁻¹42 cmol kg⁻¹59 cmol kg⁻¹42 cmol kg⁻¹52 cmol kg⁻¹33 cmol kg⁻¹
Soil Cation Exchange Capacity27 cmol kg⁻¹13 cmol kg⁻¹24 cmol kg⁻¹13 cmol kg⁻¹16 cmol kg⁻¹35 cmol kg⁻¹
Base Saturation100 %83 %86 %83 %100 %100 %
Total Exchangeable Bases28.8 cmol kg⁻¹11.6 cmol kg⁻¹19.5 cmol kg⁻¹11.6 cmol kg⁻¹24.3 cmol kg⁻¹37.6 cmol kg⁻¹
Calcium Carbonate6 %0.1 %0 %0.1 %7 %1.4 %
Calcium Sulphate0 %0 %0 %0 %0 %0 %
Exchangeable Sodium2 %2 %2 %2 %1 %1 %
Electrical Conductivity0.1 dS m-10.1 dS m-10.1 dS m-10.1 dS m-10.4 dS m-10.4 dS m-1
Subsoil Properties
Gravel 9 %3 %9 %10 % 
Sand 47 %40 %47 %34 % 
Silt 26 %23 %26 %43 % 
Clay 27 %37 %27 %23 % 
USDA Texture Sandy clay loamClay loamSandy clay loamLoam 
Reference Bulk Density 1.38 g/cm³1.32 g/cm³1.38 g/cm³1.38 g/cm³ 
Bulk Density 1.44 g/cm³1.35 g/cm³1.44 g/cm³1.45 g/cm³ 
Organic Carbon 0.47 %0.65 %0.47 %0.43 % 
PH 6.77.26.78.1 
Clay Cation Exchange Capacity 44 cmol kg⁻¹67 cmol kg⁻¹44 cmol kg⁻¹54 cmol kg⁻¹ 
Soil Cation Exchange Capacity 15 cmol kg⁻¹27 cmol kg⁻¹15 cmol kg⁻¹16 cmol kg⁻¹ 
Base Saturation 92 %90 %92 %100 % 
Total Exchangeable Bases 11.9 cmol kg⁻¹23.9 cmol kg⁻¹11.9 cmol kg⁻¹28.7 cmol kg⁻¹ 
Calcium Carbonate 0.1 %0.1 %0.1 %8.7 % 
Calcium Sulphate 0 %0.1 %0 %0.4 % 
Exchangeable Sodium 1 %2 %1 %1 % 
Electrical Conductivity 0.1 dS m-10.1 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