San Francisco Peninsular Watershed
— Protected Area Boundary | | A | B | | | | | | Share | 50 % | 30 % | 10 % | 10 % | 60 % | 30 % | 10 % | | Soil Type | Haplic Phaeozems | Luvic Phaeozems | Chromic Vertisols | Lithosols | Chromic Luvisols | Eutric Fluvisols | Mollic Gleysols | | Topsoil Texture | Medium | Medium | Fine | Medium | Medium | Medium | Medium | | Reference Depth | 100 cm | 100 cm | 100 cm | 10 cm | 100 cm | 100 cm | 100 cm | | Drainage | Moderately well | Moderately well | Poor | Imperfectly | Moderately well | Poor | Poor | | Available Water Capacity | 150 m | 150 m | 125 m | 15 mm | 150 m | 150 m | 150 m | | Misc. Property | | | Vertic (cracks of more than 1 cm wide) | | | | | | Topsoil Properties | | Gravel | 7 % | 4 % | 4 % | 26 % | 9 % | 4 % | 4 % | | Sand | 39 % | 35 % | 16 % | 43 % | 47 % | 39 % | 38 % | | Silt | 38 % | 41 % | 29 % | 34 % | 29 % | 41 % | 40 % | | Clay | 23 % | 24 % | 55 % | 23 % | 24 % | 20 % | 22 % | | USDA Texture | Loam | Loam | Clay | Loam | Loam | Loam | Loam | | Reference Bulk Density | 1.38 g/cm³ | 1.37 g/cm³ | 1.21 g/cm³ | 1.39 g/cm³ | 1.39 g/cm³ | 1.41 g/cm³ | 1.39 g/cm³ | | Bulk Density | 1.33 g/cm³ | 1.28 g/cm³ | 1.65 g/cm³ | 1.3 g/cm³ | 1.54 g/cm³ | 1.36 g/cm³ | 1.28 g/cm³ | | Organic Carbon | 1.83 % | 1.68 % | 0.75 % | 1.4 % | 0.86 % | 0.9 % | 1.74 % | | PH | 6.4 | 6.2 | 7.9 | 7.6 | 6.4 | 7.3 | 6.5 | | Clay Cation Exchange Capacity | 55 cmol kg⁻¹ | 52 cmol kg⁻¹ | 75 cmol kg⁻¹ | 42 cmol kg⁻¹ | 38 cmol kg⁻¹ | 62 cmol kg⁻¹ | 45 cmol kg⁻¹ | | Soil Cation Exchange Capacity | 18 cmol kg⁻¹ | 19 cmol kg⁻¹ | 44 cmol kg⁻¹ | 15 cmol kg⁻¹ | 12 cmol kg⁻¹ | 16 cmol kg⁻¹ | 17 cmol kg⁻¹ | | Base Saturation | 87 % | 87 % | 100 % | 100 % | 89 % | 91 % | 87 % | | Total Exchangeable Bases | 11.4 cmol kg⁻¹ | 16.1 cmol kg⁻¹ | 45.2 cmol kg⁻¹ | 15.6 cmol kg⁻¹ | 10 cmol kg⁻¹ | 16.4 cmol kg⁻¹ | 9.9 cmol kg⁻¹ | | Calcium Carbonate | 0 % | 0 % | 2.5 % | 3.9 % | 0 % | 1 % | 0 % | | Calcium Sulphate | 0 % | 0 % | 0 % | 0 % | 0 % | 0 % | 0 % | | Exchangeable Sodium | 1 % | 2 % | 1 % | 4 % | 1 % | 2 % | 2 % | | Electrical Conductivity | 0.1 dS m-1 | 0.1 dS m-1 | 0.2 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 | 3 % | 5 % | 5 % | | 8 % | 8 % | 3 % | | Sand | 43 % | 30 % | 15 % | | 39 % | 41 % | 37 % | | Silt | 35 % | 36 % | 28 % | | 27 % | 38 % | 35 % | | Clay | 22 % | 34 % | 57 % | | 34 % | 21 % | 28 % | | USDA Texture | Loam | Clay loam | Clay | | Clay loam | Loam | Clay loam | | Reference Bulk Density | 1.4 g/cm³ | 1.31 g/cm³ | 1.21 g/cm³ | | 1.33 g/cm³ | 1.4 g/cm³ | 1.35 g/cm³ | | Bulk Density | 1.39 g/cm³ | 1.37 g/cm³ | 1.76 g/cm³ | | 1.52 g/cm³ | 1.39 g/cm³ | 1.36 g/cm³ | | Organic Carbon | 0.64 % | 0.69 % | 0.45 % | | 0.38 % | 0.4 % | 0.67 % | | PH | 6.8 | 6.8 | 8.1 | | 6.3 | 7.5 | 7 | | Clay Cation Exchange Capacity | 64 cmol kg⁻¹ | 64 cmol kg⁻¹ | 73 cmol kg⁻¹ | | 40 cmol kg⁻¹ | 58 cmol kg⁻¹ | 44 cmol kg⁻¹ | | Soil Cation Exchange Capacity | 16 cmol kg⁻¹ | 24 cmol kg⁻¹ | 43 cmol kg⁻¹ | | 15 cmol kg⁻¹ | 14 cmol kg⁻¹ | 14 cmol kg⁻¹ | | Base Saturation | 92 % | 92 % | 100 % | | 93 % | 97 % | 94 % | | Total Exchangeable Bases | 12.2 cmol kg⁻¹ | 23.8 cmol kg⁻¹ | 47.5 cmol kg⁻¹ | | 12.3 cmol kg⁻¹ | 15.1 cmol kg⁻¹ | 11 cmol kg⁻¹ | | Calcium Carbonate | 0 % | 0.4 % | 3.9 % | | 0 % | 3.9 % | 0.4 % | | Calcium Sulphate | 0 % | 0 % | 0 % | | 0 % | 0 % | 0 % | | Exchangeable Sodium | 1 % | 2 % | 3 % | | 1 % | 3 % | 1 % | | Electrical Conductivity | 0.1 dS m-1 | 0.1 dS m-1 | 0.3 dS m-1 | | 0.1 dS m-1 | 0.1 dS m-1 | 0.1 dS m-1 |
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