World Species : Protected Area : Duncton to Bignor Escarpment

Duncton to Bignor Escarpment

Location:	England, United Kingdom
Area:	530 acres (214 hectares)
Species:	All Endangered Invasive
Website:	View website
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

English Lowlands beech forests

Soils

— Protected Area Boundary

	A				B

Share	40 %	30 %	15 %	15 %	50 %	25 %	20 %	5 %
Soil Type	Eutric Gleysols	Stagnic Luvisols	Gleyic Cambisols	Haplic Luvisols	Rendzic Leptosols	Eutric Cambisols	Haplic Luvisols	Calcaric Regosols
Topsoil Texture	Fine	Medium	Fine	Medium	Medium	Medium	Medium	Medium
Reference Depth	100 cm	100 cm	100 cm	100 cm	30 cm	100 cm	100 cm	100 cm
Drainage	Very poor	Poor	Poor	Moderately well	Imperfectly	Imperfectly	Moderately well	Imperfectly
Available Water Capacity	75 m	100 m	100 m	100 m	50 mm	50 m	150 m	50 m
Phase 1						Lithic		Lithic
Root Obstacle	None to 80 cm	None to 80 cm	None to 80 cm	None to 80 cm		40 - 60 cm	None to 80 cm	None to 80 cm
Impermeable Layer	0 - 40 cm	40 - 80 cm	40 - 80 cm	40 - 80 cm		None to 150 cm	None to 150 cm	None to 150 cm
Soil Water Regime	Wet within 80 cm over 6 months, but not wet within 40 cm for over 11 month	Wet within 80 cm over 6 months, but not wet within 40 cm for over 11 month	Wet within 80 cm for 3 to 6 months, but not wet within 40 cm for over 1 month	Wet within 80 cm for 3 to 6 months, but not 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 month	Not 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 month
Topsoil Properties
Gravel	1 %	4 %	10 %	4 %	16 %	9 %	4 %	14 %
Sand	17 %	37 %	19 %	41 %	37 %	42 %	41 %	44 %
Silt	32 %	44 %	32 %	37 %	44 %	36 %	37 %	35 %
Clay	51 %	19 %	49 %	22 %	19 %	22 %	22 %	21 %
USDA Texture	Clay	Loam	Clay	Loam	Loam	Loam	Loam	Loam
Reference Bulk Density	1.22 g/cm³	1.41 g/cm³	1.24 g/cm³	1.4 g/cm³	1.41 g/cm³	1.4 g/cm³	1.4 g/cm³	1.41 g/cm³
Bulk Density	1.25 g/cm³	1.4 g/cm³	1.31 g/cm³	1.43 g/cm³	1.24 g/cm³	1.37 g/cm³	1.43 g/cm³	1.37 g/cm³
Organic Carbon	1.25 %	0.99 %	1.41 %	0.74 %	2.13 %	1 %	0.74 %	0.75 %
PH	5.8	5.8	5.6	6.5	7.5	6.6	6.5	8
Clay Cation Exchange Capacity	37 cmol kg⁻¹	48 cmol kg⁻¹	25 cmol kg⁻¹	47 cmol kg⁻¹	80 cmol kg⁻¹	55 cmol kg⁻¹	47 cmol kg⁻¹	45 cmol kg⁻¹
Soil Cation Exchange Capacity	25 cmol kg⁻¹	12 cmol kg⁻¹	20 cmol kg⁻¹	13 cmol kg⁻¹	27 cmol kg⁻¹	16 cmol kg⁻¹	13 cmol kg⁻¹	17 cmol kg⁻¹
Base Saturation	78 %	62 %	74 %	91 %	100 %	93 %	91 %	100 %
Total Exchangeable Bases	18.9 cmol kg⁻¹	8.4 cmol kg⁻¹	15.6 cmol kg⁻¹	11 cmol kg⁻¹	28.8 cmol kg⁻¹	14 cmol kg⁻¹	11 cmol kg⁻¹	26.8 cmol kg⁻¹
Calcium Carbonate	0 %	0 %	0 %	0 %	6 %	0 %	0 %	15 %
Calcium Sulphate	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %
Exchangeable Sodium	2 %	1 %	1 %	1 %	2 %	2 %	1 %	2 %
Electrical Conductivity	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.2 dS m-1
Subsoil Properties
Gravel	1 %	4 %	24 %	3 %		12 %	3 %	18 %
Sand	19 %	31 %	18 %	37 %		41 %	37 %	40 %
Silt	29 %	38 %	31 %	34 %		34 %	34 %	35 %
Clay	52 %	31 %	51 %	29 %		25 %	29 %	25 %
USDA Texture	Clay	Clay loam	Clay	Clay loam		Loam	Clay loam	Loam
Reference Bulk Density	1.23 g/cm³	1.33 g/cm³	1.23 g/cm³	1.35 g/cm³		1.38 g/cm³	1.35 g/cm³	1.37 g/cm³
Bulk Density	1.35 g/cm³	1.6 g/cm³	1.36 g/cm³	1.51 g/cm³		1.39 g/cm³	1.51 g/cm³	1.5 g/cm³
Organic Carbon	0.45 %	0.29 %	0.49 %	0.36 %		0.37 %	0.36 %	0.47 %
PH	6	5.9	5.7	6.7		7	6.7	8.1
Clay Cation Exchange Capacity	40 cmol kg⁻¹	50 cmol kg⁻¹	31 cmol kg⁻¹	50 cmol kg⁻¹		55 cmol kg⁻¹	50 cmol kg⁻¹	52 cmol kg⁻¹
Soil Cation Exchange Capacity	23 cmol kg⁻¹	14 cmol kg⁻¹	21 cmol kg⁻¹	14 cmol kg⁻¹		15 cmol kg⁻¹	14 cmol kg⁻¹	15 cmol kg⁻¹
Base Saturation	84 %	83 %	77 %	93 %		93 %	93 %	100 %
Total Exchangeable Bases	17 cmol kg⁻¹	10.2 cmol kg⁻¹	14.9 cmol kg⁻¹	13.1 cmol kg⁻¹		15.1 cmol kg⁻¹	13.1 cmol kg⁻¹	36.5 cmol kg⁻¹
Calcium Carbonate	0 %	0 %	0 %	0 %		0.1 %	0 %	15 %
Calcium Sulphate	0 %	0 %	0 %	0 %		0 %	0 %	0 %
Exchangeable Sodium	3 %	1 %	1 %	1 %		2 %	1 %	2 %
Electrical Conductivity	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1		0.1 dS m-1	0.1 dS m-1	0.3 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