Scenario | R2 | R3 | ||||||
Horizon (FAO, 1990) | Ap | Ah | AB1 | AB2 | Ap1 | Ap2 | Bk | C |
Depth (cm) | 0 - 20 | 20 - 45 | 45 - 65 | 65 - 100 | 0 - 45 | 45 - 75 | 75 - 145 | 145 - 160 |
Basic properties |
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Sand (%) | 67 | 72 | 75 | 74 | 23 | 25 | 17 | 14 |
Silt (%) | 19 | 16 | 13 | 16 | 43 | 42 | 48 | 50 |
Clay (%) | 14 | 12 | 12 | 10 | 34 | 33 | 35 | 36 |
Texture (e) | Sandy loam | Sandy loam | Sandy loam | Sandy loam | Clay loam | Clay loam | Silty clay loam | Silty clay loam |
Organic carbon (%) | 4.0 | 2.4 | 0.8 | 0.5 (a) | 1.0 | 1.0 | 0.35 | 0.29 |
Bulk density (g/cm3) | 1.15 (b) | 1.29 (b) | 1.36 (b) | 1.41 (b) | 1.46 (d) | 1.49 (d) | 1.52 (d) | 1.54 (d) |
pH | 4.5 | 4.9 | 5.4 | 5.3 | 7.9 | 7.9 | 8.3 | 8.6 |
Structure development (f) | Moderate | Weak | Weak | Weak | Moderate | Moderate | Weak | Weak |
Structure size (f) | Medium | Medium | Medium | Medium | fine | Fine | coarse | Very coarse |
Structure shape (f) | Subang. b. (g) | Subang. b. (g) | Subang. b. (g) | Subang. b. (g) | Granular | Granular | Subang. b. (g) | Angular blocky |