Dependent variable | Intercept | Variable 1 | Variable 2 | Variable 3 | Variable 4 | R2 | RMSE | ||||||
Coeff. | Std. Error | Coeff. | Std. Error | Coeff. | Std. Error | Coeff. | Std. Error | Coeff. | Std. Error | ||||
Equation (1) | Mg | 66.1 | 7.6 | Ca | 0.585 | 16.4 | |||||||
0.081 | 0.005 | ||||||||||||
Equation (2) | Zn | 1.14 | 0.3 | Cu | DTW > 4 ha | 0.232 | 0.701 | ||||||
0.364 | 0.051 | 0.055 | 0.013 | ||||||||||
Equation (3) | C | 0.26 | 0.28 | Silt | NO3-N | 0.274 | 0.225 | ||||||
0.048 | 0.006 | −0.040 | 0.007 | ||||||||||
Equation (4) | P | −73.7 | 34.4 | Ca | Mn | Sand % | 0.535 | 36.5 | |||||
0.068 | 0.013 | 2.22 | 0.28 | 6.2 | 0.7 | ||||||||
Equation (5) | S | 238 | 25 | K | pH-H2O | Ca | 0.355 | 14.1 | |||||
0.224 | 0.027 | −43.0 | 5.5 | 0.024 | 0.005 | ||||||||
Equation (6) | Mn | −35.1 | 4.6 | Ca | Fe | P | 0.523 | 7.73 | |||||
0.015 | 0.003 | 0.111 | 0.017 | 0.079 | 0.012 | ||||||||
Equation (7) | Ca | −1727 | 257 | pH-H2O | P | DTW > 4 ha | 0.553 | 160 | |||||
513 | 49 | 1.76 | 0.23 | −0.182 | 0.03 | ||||||||
Equation (8) | NO3-N | −0.77 | 0.68 | NH4-N | DTW > 4 ha | K | 0.585 | 1.61 | |||||
6.67 | 0.63 | −0.323 | 0.029 | 0.029 | 0.003 | ||||||||
Equation (9) | pH-H2O | 4.6 | 0.1 | Ca | S | K | 0.554 | 0.165 | |||||
0.00058 | 0.00005 | −0.0056 | 0.0007 | 0.0022 | 0.0003 | ||||||||
Equation (10) | NH4-N | 0.47 | 0.05 | K | DTW > 4 ha | NO3-N | 0.42 | 0.149 | |||||
−0.0016 | 0.0003 | 0.020 | 0.003 | 0.042 | 0.004 | ||||||||
Equation (11) | Cu | 0.449 | 0.07 | Ca | Sand | Fe | P | 0.630 | 0.055 | ||||
0.00014 | 0.00002 | −0.0097 | 0.0013 | 0.00075 | 0.00002 | 0.00046 | 0.0001 | ||||||
Equation (12) | Cs137 | −3884 | 474 | Silt | K | C | Cu | 0.546 | 332 | ||||
73.1 | 10.9 | 3.0 | 0.6 | 472 | 100 | 125 | 26 | ||||||
Equation (13) | Fe | 431 | 44 | Cu | Mn | NO3-N | pH-H2O | 0.421 | 26.6 | ||||
12.3 | 2.1 | 0.94 | 0.17 | −4.1 | 0.8 | −36.7 | 8.6 | ||||||
Equation (14) | K | −109 | 51 | pH | NO3-N | P | NH4-N | 0.42 | 31.4 | ||||
38.9 | 9.6 | 7.1 | 1.0 | 0.24 | 0.04 | −87.4 | 12.8 |