Table 5 summary of comparative studies
Models | Parameters | Metrics | References | ||
|---|---|---|---|---|---|
MSE | RMSE | R2 | |||
Random Forest | Nitrogen | – | – | 0.99 | |
Phosphorus | – | – | 0.99 | ||
Humidity | – | – | 0.99 | ||
Potassium | – | – | 0.99 | ||
Temperature | – | – | 0.99 | ||
pH | – | – | 0.99 | ||
Support vector machine regression | Organic carbon | – | 0.66 | 0.13 | |
pH | – | 0.58 | 0.36 | ||
Nitrogen | – | 0.40 | 12.36 | ||
Phosphorus | – | 0.71 | 49.52 | ||
Electric Conductivity | – | 0.59 | 0.21 | ||
Potassium | – | 0.24 | 26.87 | ||
Zinc | – | 0.84 | 0.39 | ||
Sand | – | 0.66 | 7.75 | ||
Silt | – | 0.54 | 4.07 | ||
Clay | – | 0.68 | 4.85 | ||
Partial Least Squares Regression | Organic carbon | – | 0.63 | 0.14 | |
pH | – | 0.61 | 0.34 | ||
Nitrogen | – | 0.36 | 12.55 | ||
Phosphorus | – | 0.72 | 48.09 | ||
Electric Conductivity | – | 0.63 | 0.19 | ||
Potassium | – | 0.13 | 28.55 | ||
Zinc | – | 0.79 | 0.44 | ||
Sand | – | 0.60 | 8.36 | ||
Silt | – | 0.41 | 4.60 | ||
Clay | – | 0.66 | 5.02 | ||
Autoregressive with Kalman filters | Soil temperature | 0.40 | – | – | |
Humidity | 0.20 | – | – | ||
