Research Article
Pedometric Mapping of Soil Classes: A Case Study of San Mateo de Otao, Peru
Table 1
Predictor variables description by soil-forming factor. Mean (µ) plus standard deviation (σ) and range (minimum, maximum) are reported.
| | Name | Units | µ ± σ | Range |
| | Relief | | Elevation (MDE) | m.a.s.l. | 2739 ± 689.53 | [1202, 4349] | | Slope (PD) | Percentage | 70.97 ± 29.82 | [0, 387.49] | | Aspect (OR) | Grades | 194.99 ± 78.29 | [2.62, 360] | | Convergence Index (ICO) | No units | −0.04 ± 4.39 | [−56.72, 93.72] | | Plan curvature (CPP) | No units | 0 ± 0.02 | [−0.17, 0.17] | | Profile curvature (CPL) | No units | 0 ± 0.02 | [−0.19, 0.16] | | LS factor (LS) | No units | 12.16 ± 4.94 | [0, 53.57] | | Relative slope position (RSP) | No units | 0.38 ± 0.35 | [0, 1] | | Topographic Wetness Index (TWI) | m2 | 5.52 ± 1.48 | [1.86, 22.52] | | Valley depth (VD) | m | 200.11 ± 163.82 | [0, 663.53] |
| | Climate | | Annual cumulative evapotranspiration (ET) | mm | 1258.52 ± 98.99 | [1066.92, 1414.09] | | Annual cumulative precipitation (PPT) | mm | 348.53 ± 101.40 | [135.95, 609.54] | | Annual mean temperature (TM) | °C | 11.25 ± 3.03 | [5.39, 16.59] | | Water vapour pressure (WVP) | kPa | 1.06 ± 0.20 | [0.71, 1.48] | | Wind speed (WS) | m.s−1 | 2.97 ± 0.28 | [2.49, 3.54] | | Total solar radiation (RS) | kJ.m−2día−1 | 17241 ± 445 | [16357, 18295] | | Parent material | | Quartz Index (QI) | No units | 1.0 ± 0.0 | 0.99–1.01 | | Carbonates Index (CI) | No units | 1.01 ± 0.0 | 1.00–1.02 | | Mafic Index (MI) | No units | 0.99 ± 0.0 | 0.98–1.02 | | Organisms | | Normalized Difference Vegetation Index (NDVI) | No units | 0.42 ± 0.16 | 0–0.96 | | Soil biological crust (CB) | No units | 0.84 ± 0.16 | 0.07–1.97 |
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