Research Article
Application of Fractional Differential Calculation in Pretreatment of Saline Soil Hyperspectral Reflectance Data
Table 1
Salinization degree and soil sample classification statistics.
| | Salinization degree | Salt content (g/kg) | Area A | Area B | | Samples | Proportion (%) | Mean (g/kg) | Samples | Proportion (%) | Mean (g/kg) |
| | Nonsaline soil | <3.0 | 0 | 0.000% | 0 | 1 | 3.333% | 2.700 | | Mild saline soil | 3.0~5.0 | 0 | 0.000% | 0 | 2 | 6.667% | 3.775 | | Moderate saline soil | 5.0~10.0 | 1 | 4.000% | 7.150 | 6 | 20.000% | 7.358 | | Severe saline soil | 10.0~20.0 | 21 | 84.000% | 15.220 | 13 | 43.333% | 15.519 | | Saline soil | >20.0 | 3 | 12.000% | 26.475 | 8 | 26.667% | 25.678 |
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