Table 2.
Comparison of coefficients of determination of PLSR, Lasso and GPR methods, number of Lasso coefficients (Min/1SE) in parenthesis.
| Soil Parameter | PLSR | Lasso (Min/1SE) | GPR |
|---|---|---|---|
| Ca | 0.87 | 0.85/0.83 (56/31) | 0.89 |
| Mg | 0.79 | 0.75/0.69 (27/16) | 0.78 |
| K | 0.64 | 0.65/0.59 (51/16) | 0.66 |
| N | 0.51 | 0.65/0.60 (34/10) | 0.51 |
| P | 0.14 | 0.21/0.18 (18/8) | 0.28 |
| Fe | 0.77 | 0.76/0.71 (52/27) | 0.72 |
| Mn | 0.21 | 0.55/0.51 (51/29) | 0.13 |
| Al | 0.79 | 0.74/0.72 (76/36) | 0.81 |
| P (pa) | 0.22 | 0.25/0.11 (57/10) | 0.35 |
| Humus | 0.56 | 0.66/0.58 (47/10) | 0.54 |
| pH | 0.91 | 0.92/0.91 (36/32) | 0.95 |