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Table 4.11 Comparison of actual and predicted denitrification rate values.
Actual Rdn Predicted Rdn Predicted Rdn (S) Error Error (S) % Error % Error (S)
0.65 8.83 1.2 8.18 0.55 1258.46 84.62
0.01 22.88 2.75 22.88 2.75 228700.00 27400.00
0.21 20.86 4.62 20.65 4.41 9833.33 2100.00
0.27 27.68 3.52 27.41 3.24 10151.85 1203.70
0.3 22.25 3.14 21.95 2.84 7316.67 946.67
0.29 22.54 2.42 22.24 2.12 7672.41 734.48
0.05 30.59 6.42 30.54 6.37 61080.00 12740.00
1.62 30.56 5.85 28.94 4.23 1786.42 261.11
2.98 30.54 5.48 27.56 2.5 924.83 83.89
10.72 27.48 7.15 16.76 -3.56 156.34 -33.30
2.45 1.62 0.28 -0.83 -2.16 -33.88 -88.57
0.09 29.63 6.96 29.55 6.87 32822.22 7633.33
0.02 18.99 -1.62 18.97 -1.64 94850.00 -8200.00
0.01 21.23 -2.8 21.23 -2.81 212200.00 -28100.00
0.01 22.24 0.79 22.22 0.78 222300.00 7800.00
0.01 22.65 0.71 22.65 0.71 226400.00 7000.00
0.01 19.96 -1.01 19.95 -1.02 199500.00 -10200.00
0.01 19.57 -1.59 19.56 -1.6 195600.00 -16000.00
The two developed equations are applied to the test dataset and the results of the
predictions are shown above. The errors are too large to have any predictive capability.
4.2.4. Texture 4 (Loamy Sand)
No significant analysis possible due to limited data.
4.2.5. Texture 5 (Sand)
The sand database is divided into two groups, the first group comprises of 84 records and
is used for the development of the equations and the second contains 19 records and is
used as an assessment
Equation 4.8 and Equation 4.9 are developed using the information from Table 4.12 and
Table 4.13).
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