Parameter | Unit | MEAN | SD | Model | pre-processing | R2 | RMSE | Rel RMSE | RPD | RPIQ |
---|---|---|---|---|---|---|---|---|---|---|
Clay | % | 4.97 | 1.69 | PLS | ABS | 0.043 | 1 634 | 0.33 | 1.03 | 1.22 |
C/N | – | 14.34 | 9.01 | PLS | SNV | 0.018 | 9 100 | 0.63 | 1 | 0.54 |
CaCO3 vol | % | 0.87 | 2.03 | Cubist | min-max Norm | 0.780 | 0.673 | 0.77 | 3.01 | 0.48 |
CaCO3 titr | % | 1.15 | 2.44 | Cubist | min-max Norm | 0.871 | 0.694 | 0.61 | 3.52 | 0.84 |
Mg | mg kg−1 | 70.59 | 61.70 | Cubist | SNV | 0.951 | 23 463 | 0.33 | 2.63 | 1.78 |
Ca | mg kg−1 | 1504.29 | 2014.76 | Cubist | min-max Norm | 0.924 | 735 515 | 0.49 | 2.74 | 3.86 |
Zn | mg kg−1 | 9.06 | 3.07 | PLS | SNV | 0.068 | 3 548 | 0.39 | 1.04 | 1.15 |
Cd | mg kg−1 | 0.12 | 0.12 | Cubist | min-max Norm | 0.836 | 0.052 | 0.42 | 2.26 | 3.13 |
P | mg kg−1 | 176.88 | 63.21 | Cubist | ABS | 0.463 | 67 680 | 0.38 | 0.93 | 2.12 |
Parameter | Unit | Min | Mean | Median | Max | SD |
---|---|---|---|---|---|---|
Clay | % | 1.00 | 4.97 | 5.00 | 8.00 | 1.69 |
C/N | – | 6.40 | 14.34 | 11.80 | 63.00 | 9.10 |
CaCO3 vol | % | 0.00 | 0.87 | 0.00 | 12.00 | 2.03 |
CaCO3 titr | % | 0.00 | 1.15 | 0.00 | 13.10 | 2.44 |
Mg | mg kg−1 | 16.30 | 70.59 | 47.70 | 314.80 | 61.70 |
Ca | mg kg−1 | 32.60 | 1504.29 | 322.70 | 7424.60 | 2014.76 |
Zn | mg kg−1 | 4.40 | 9.06 | 8.50 | 27.40 | 3.70 |
Cd | mg kg−1 | 0.00 | 0.12 | 0.09 | 0.55 | 0.12 |
P | mg kg−1 | 23.30 | 176.88 | 153.60 | 275.60 | 63.21 |
RAW | MSC | SNV | max-min NORM | ABS | ||||||
---|---|---|---|---|---|---|---|---|---|---|
MEAN | SD | MEAN | SD | MEAN | SD | MEAN | SD | MEAN | SD | |
GREEN | 0.47 | 0.12 | 0.50 | 0.11 | −0.34 | 0.32 | 0.44 | 0.19 | 0.35 | 0.13 |
RED | 0.41 | 0.15 | 0.38 | 0.09 | −0.74 | 0.17 | 0.52 | 0.23 | 0.43 | 0.21 |
NIR | 0.81 | 0.29 | 0.81 | 0.02 | 1.08 | 0.17 | 0.33 | 0.15 | 0.13 | 0.20 |
Spectral index | Abbreviation | Formula |
---|---|---|
Normalized Difference Vegetation Index | NDVI |
|
Green Normalized Fifference Vegetation Index | GNDVI |
|
Green Normalized Fifference Vegetation Index normal | GNDVInormal |
|
Infrared Percentage Vegetation Index | IPVI |
|
Soil-adjusted Vegetation Index | SAVI |
|
Radar Vegetation Index | RVI |
|
Green-Red Vegetation Index | GRVI |
|