Parameter

Model

C₀

C₁

C₀ + C₁

Range

DSD (%)

SD

Estimated error

MSE

ASE

RMSE

RMSSE

OM

Exponential

0.72

0.658

1.378

99.6

52.25

Moderate

0.18

0.19

1.14

0.96

N^a

Gaussian

0.13

0.02

0.15

763.2

86.67

Weak

−0.04

138.18

145

1.06

P^a

Exponential

0.28

0.06

0.34

338.35

82.35

Weak

0.015

35.91

30.84

0.84

K^a

Exponential

0.1

0.07

0.17

99.61

58.82

Moderate

−0.02

84.34

77.19

0.93

S

Exponential

2.19

2.97

5.16

184.03

42.44

Moderate

−0.02

2.08

2.06

0.99

pH^a

Exponential

0.002

0.004

0.006

99.62

33.33

Moderate

0.02

0.48

0.48

1