Arkansas Post National Memorial
— Protected Area Boundary | | A | B | | | | | | Share | 40 % | 20 % | 20 % | 20 % | 70 % | 30 % | | Soil Type | Eutric Gleysols | Orthic Solonetz | Gleyic Luvisols | Humic Gleysols | Eutric Planosols | Orthic Luvisols | | Topsoil Texture | Fine | Medium | Medium | Medium | Medium | Medium | | Reference Depth | 100 cm | 100 cm | 100 cm | 100 cm | 100 cm | 100 cm | | Drainage | Very poor | Moderately well | Poor | Poor | Poor | Moderately well | | Available Water Capacity | 150 m | 150 m | 150 m | 150 m | 150 m | 150 m | | Topsoil Properties | | Gravel | 7 % | 6 % | 5 % | 4 % | 4 % | 4 % | | Sand | 17 % | 47 % | 42 % | 33 % | 42 % | 47 % | | Silt | 31 % | 28 % | 36 % | 45 % | 38 % | 32 % | | Clay | 52 % | 25 % | 22 % | 22 % | 20 % | 21 % | | USDA Texture | Clay | Loam | Loam | Loam | Loam | Loam | | Reference Bulk Density | 1.22 g/cm³ | 1.39 g/cm³ | 1.4 g/cm³ | 1.38 g/cm³ | 1.41 g/cm³ | 1.41 g/cm³ | | Bulk Density | 1.25 g/cm³ | 1.53 g/cm³ | 1.4 g/cm³ | 1.2 g/cm³ | 1.44 g/cm³ | 1.42 g/cm³ | | Organic Carbon | 1.25 % | 0.66 % | 0.94 % | 3.71 % | 1.06 % | 0.82 % | | PH | 5.8 | 8.1 | 6.1 | 5.5 | 5.5 | 6.2 | | Clay Cation Exchange Capacity | 38 cmol kg⁻¹ | 46 cmol kg⁻¹ | 46 cmol kg⁻¹ | 33 cmol kg⁻¹ | 37 cmol kg⁻¹ | 35 cmol kg⁻¹ | | Soil Cation Exchange Capacity | 26 cmol kg⁻¹ | 16 cmol kg⁻¹ | 14 cmol kg⁻¹ | 18 cmol kg⁻¹ | 11 cmol kg⁻¹ | 11 cmol kg⁻¹ | | Base Saturation | 78 % | 100 % | 89 % | 34 % | 65 % | 88 % | | Total Exchangeable Bases | 19.7 cmol kg⁻¹ | 21.1 cmol kg⁻¹ | 9.8 cmol kg⁻¹ | 3.1 cmol kg⁻¹ | 8.4 cmol kg⁻¹ | 8.3 cmol kg⁻¹ | | Calcium Carbonate | 0 % | 5.8 % | 0 % | 0 % | 0 % | 0 % | | Calcium Sulphate | 0 % | 0 % | 0 % | 0 % | 0 % | 0 % | | Exchangeable Sodium | 2 % | 13 % | 1 % | 2 % | 3 % | 1 % | | Electrical Conductivity | 0.1 dS m-1 | 0.6 dS m-1 | 0.1 dS m-1 | 0.1 dS m-1 | 0.1 dS m-1 | 0.1 dS m-1 | | Subsoil Properties | | Gravel | 1 % | 8 % | 6 % | 5 % | 4 % | 5 % | | Sand | 19 % | 40 % | 35 % | 37 % | 32 % | 40 % | | Silt | 29 % | 27 % | 32 % | 35 % | 32 % | 29 % | | Clay | 52 % | 33 % | 33 % | 28 % | 36 % | 31 % | | USDA Texture | Clay | Clay loam | Clay loam | Clay loam | Clay loam | Clay loam | | Reference Bulk Density | 1.23 g/cm³ | 1.33 g/cm³ | 1.32 g/cm³ | 1.35 g/cm³ | 1.31 g/cm³ | 1.34 g/cm³ | | Bulk Density | 1.36 g/cm³ | 1.58 g/cm³ | 1.59 g/cm³ | 1.46 g/cm³ | 1.39 g/cm³ | 1.5 g/cm³ | | Organic Carbon | 0.45 % | 0.29 % | 0.28 % | 0.69 % | 0.43 % | 0.39 % | | PH | 5.9 | 8.5 | 6.5 | 5.6 | 6.3 | 6.2 | | Clay Cation Exchange Capacity | 39 cmol kg⁻¹ | 57 cmol kg⁻¹ | 45 cmol kg⁻¹ | 41 cmol kg⁻¹ | 47 cmol kg⁻¹ | 33 cmol kg⁻¹ | | Soil Cation Exchange Capacity | 23 cmol kg⁻¹ | 19 cmol kg⁻¹ | 15 cmol kg⁻¹ | 11 cmol kg⁻¹ | 17 cmol kg⁻¹ | 12 cmol kg⁻¹ | | Base Saturation | 84 % | 100 % | 96 % | 62 % | 85 % | 87 % | | Total Exchangeable Bases | 17.1 cmol kg⁻¹ | 35.7 cmol kg⁻¹ | 14.3 cmol kg⁻¹ | 9 cmol kg⁻¹ | 15.2 cmol kg⁻¹ | 9.6 cmol kg⁻¹ | | Calcium Carbonate | 0 % | 7.4 % | 0 % | 0 % | 0 % | 0 % | | Calcium Sulphate | 0 % | 0.1 % | 0 % | 0 % | 0 % | 0 % | | Exchangeable Sodium | 2 % | 39 % | 1 % | 4 % | 3 % | 1 % | | Electrical Conductivity | 0.1 dS m-1 | 2.7 dS m-1 | 0.1 dS m-1 | 0.1 dS m-1 | 0.1 dS m-1 | 0.1 dS m-1 |
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