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Table 4

The best-fit MNLR model of NEM (g O2 m−2 day−1) (R 2adj = 84.6%, R 2pred = 80.04%, S = 60.41, DW = 1.48, α-to-enter and to-remove value for stepwise selection = 0.05, n = 2724).

Term SSadj F-value T-value VIF Coefficent SE p
Regression 3447628 59.05 <0.001
Intercept −0.61 12.7 20.7 0.542
DOY 6563 1.80 −1.34 2.15 −0.0905 0.0675 0.182
DOY × Tair 44656 12.24 −3.50 2.06 −0.01349 0.00386 0.001
DOY × NH4-N 652643 178.84 13.37 65.91 0.2033 0.0152 <0.001
Tair × TP 189427 51.91 7.20 23.05 9.25 1.28 <0.001
BOD5 × SC 503696 138.03 −11.75 549.57 −0.03072 0.00262 <0.001
BOD5 × pH 538650 147.60 12.15 1091.24 6.428 0.529 <0.001
BOD5 × NH4-N 103701 28.42 −5.33 93.72 −0.3009 0.0564 <0.001
BOD5 × ortho-PO4-P 34619 9.49 −3.08 66.93 −2.773 0.90 0.002
TN × Turbidity 426060 116.75 10.81 261.51 0.8958 0.0829 <0.001
TP × Turbidity 469307 128.60 −11.34 246.90 −8.888 0.784 <0.001
Turbidity × pH 114715 31.43 −5.61 8.61 −0.3405 0.0607 <0.001
SC × NH4-N 160770 44.06 −6.64 126.55 −0.03970 0.00598 <0.001
NH4-N × NO3-N 113407 31.08 5.57 7.85 10.36 1.86 <0.001
NG 689025 62.94 <0.001
BD     −0.34 3.83 −6.2 18.5 0.737
AD     −13.69 77.72 −1141.5 83.4 <0.001
Mudurnu     −0.23 2.62 −5.7 25.0 0.821
Abant (baseline)              

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