| 统计量 | 最小值 | 最大值 | 均值 | 标准差 | 变异系数(%) |
样本集 |
|
|
|
|
|
|
pH | 152 | 4.10 | 9.05 | 6.97 | 1.39 | 19.89 |
砂粒(%) | 152 | 1.32 | 83.38 | 23.86 | 17.93 | 75.14 |
粉粒(%) | 152 | 15.19 | 90.96 | 71.45 | 16.82 | 23.54 |
黏粒(%) | 152 | 0.74 | 12.55 | 4.69 | 2.14 | 45.72 |
有机质(g∙kg−1) | 152 | 2.88 | 85.77 | 22.44 | 14.20 | 63.29 |
CEC (cmol∙kg−1) | 152 | 3.07 | 53.30 | 22.54 | 8.59 | 38.10 |
训练集 |
|
|
|
|
|
|
pH | 116 | 4.10 | 8.97 | 6.89 | 1.39 | 20.15 |
砂粒(%) | 116 | 1.32 | 77.88 | 24.25 | 17.90 | 73.81 |
粉粒(%) | 116 | 20.67 | 90.15 | 71.16 | 16.71 | 23.48 |
黏粒(%) | 116 | 0.74 | 12.55 | 4.59 | 2.19 | 47.78 |
有机质(g∙kg−1) | 116 | 2.88 | 77.13 | 22.19 | 13.26 | 59.73 |
CEC (cmol∙kg−1) | 116 | 6.36 | 53.30 | 22.20 | 8.67 | 39.04 |
测试集 |
|
|
|
|
|
|
pH | 36 | 4.53 | 9.05 | 7.23 | 1.37 | 18.91 |
砂粒(%) | 36 | 4.30 | 83.38 | 22.61 | 18.23 | 80.63 |
粉粒(%) | 36 | 15.19 | 90.96 | 72.38 | 17.37 | 24.00 |
黏粒(%) | 36 | 1.44 | 11.60 | 5.01 | 1.97 | 39.47 |
有机质(g∙kg−1) | 36 | 5.32 | 85.77 | 23.24 | 17.09 | 73.54 |
CEC (cmol∙kg−1) | 36 | 3.07 | 41.51 | 23.66 | 8.36 | 35.34 |