Apriltsi

Location:Bulgaria
Area:4,800 acres (1,943 hectares)
Species:All  Endangered  Invasive
Climate:View Climate Data
Land Use:View Land Use Data
Köppen climate classification:Dfb (Climate: snow; Precipitation: fully humid; Temperature: warm summer)
Natura 2000 Data Sheet:View Data Sheet  Explanatory notes

Ecoregions

Rodope montane mixed forests

Soils

Protected Area Boundary
 AB
   
Share60 %20 %10 %10 %40 %35 %15 %10 %
Soil TypeHaplic LuvisolsHaplic LuvisolsEutric CambisolsLithic LeptosolsDystric CambisolsEutric CambisolsUmbric LeptosolsLithic Leptosols
Topsoil TextureMediumMediumMediumMediumMediumMediumMediumMedium
Reference Depth100 cm100 cm100 cm10 cm100 cm100 cm30 cm10 cm
DrainageModerately wellModerately wellImperfectlyImperfectlyModerately wellModerately wellImperfectlyImperfectly
Available Water Capacity100 m100 m15 m15 mm100 m100 m15 mm15 mm
Phase 1StonyStonyStony StonyStonyStonyStony
Phase 2  Lithic     
Root Obstacle20 - 40 cm20 - 40 cmNone to 80 cm None to 80 cmNone to 80 cm  
Impermeable LayerNone to 150 cmNone to 150 cmNone to 150 cm None 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 monthNot wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month 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 month  
Topsoil Properties
Gravel4 %4 %9 %21 %10 %9 %6 %21 %
Sand41 %41 %42 %42 %42 %42 %49 %42 %
Silt37 %37 %36 %34 %38 %36 %31 %34 %
Clay22 %22 %22 %24 %20 %22 %20 %24 %
USDA TextureLoamLoamLoamLoamLoamLoamLoamLoam
Reference Bulk Density1.4 g/cm³1.4 g/cm³1.4 g/cm³1.38 g/cm³1.41 g/cm³1.4 g/cm³1.43 g/cm³1.38 g/cm³
Bulk Density1.43 g/cm³1.43 g/cm³1.37 g/cm³1.3 g/cm³1.3 g/cm³1.37 g/cm³1.1 g/cm³1.3 g/cm³
Organic Carbon0.74 %0.74 %1 %1.61 %1.45 %1 %2.4 %1.61 %
PH6.56.56.67.55.16.65.17.5
Clay Cation Exchange Capacity47 cmol kg⁻¹47 cmol kg⁻¹55 cmol kg⁻¹42 cmol kg⁻¹32 cmol kg⁻¹55 cmol kg⁻¹34 cmol kg⁻¹42 cmol kg⁻¹
Soil Cation Exchange Capacity13 cmol kg⁻¹13 cmol kg⁻¹16 cmol kg⁻¹16 cmol kg⁻¹12 cmol kg⁻¹16 cmol kg⁻¹12 cmol kg⁻¹16 cmol kg⁻¹
Base Saturation91 %91 %93 %100 %38 %93 %36 %100 %
Total Exchangeable Bases11 cmol kg⁻¹11 cmol kg⁻¹14 cmol kg⁻¹15.5 cmol kg⁻¹4.3 cmol kg⁻¹14 cmol kg⁻¹4.7 cmol kg⁻¹15.5 cmol kg⁻¹
Calcium Carbonate0 %0 %0 %3.9 %0 %0 %0 %3.9 %
Calcium Sulphate0 %0 %0 %0 %0 %0 %0 %0 %
Exchangeable Sodium1 %1 %2 %3 %2 %2 %4 %3 %
Electrical Conductivity0.1 dS m-10.1 dS m-10.1 dS m-10.1 dS m-10.1 dS m-10.1 dS m-10.1 dS m-10.1 dS m-1
Subsoil Properties
Gravel3 %3 %12 % 19 %12 %  
Sand37 %37 %41 % 45 %41 %  
Silt34 %34 %34 % 35 %34 %  
Clay29 %29 %25 % 20 %25 %  
USDA TextureClay loamClay loamLoam LoamLoam  
Reference Bulk Density1.35 g/cm³1.35 g/cm³1.38 g/cm³ 1.42 g/cm³1.38 g/cm³  
Bulk Density1.51 g/cm³1.51 g/cm³1.39 g/cm³ 1.36 g/cm³1.39 g/cm³  
Organic Carbon0.36 %0.36 %0.37 % 0.5 %0.37 %  
PH6.76.77 5.27  
Clay Cation Exchange Capacity50 cmol kg⁻¹50 cmol kg⁻¹55 cmol kg⁻¹ 35 cmol kg⁻¹55 cmol kg⁻¹  
Soil Cation Exchange Capacity14 cmol kg⁻¹14 cmol kg⁻¹15 cmol kg⁻¹ 9 cmol kg⁻¹15 cmol kg⁻¹  
Base Saturation93 %93 %93 % 33 %93 %  
Total Exchangeable Bases13.1 cmol kg⁻¹13.1 cmol kg⁻¹15.1 cmol kg⁻¹ 2.6 cmol kg⁻¹15.1 cmol kg⁻¹  
Calcium Carbonate0 %0 %0.1 % 0 %0.1 %  
Calcium Sulphate0 %0 %0 % 0 %0 %  
Exchangeable Sodium1 %1 %2 % 2 %2 %  
Electrical Conductivity0.1 dS m-10.1 dS m-10.1 dS m-1 0.1 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