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5.4.2. Texture 2 (Clay Loam)
Figure 5.4 ANN 1-7-20
The clay loam dataset is made of 77 records this dataset is reduced to 69 records due to
eight missing values. The network developed for this texture has a percentage error range
of 1449 % - 1.35 % (Figure 5.5). Only ten of the 69 values have an error of over a 100%.
This is the best perfroming network that had been developed for this texture. The network
predicts the denitrification rate to within a reasonable error for the higher rates but seems
to have trouble with the lower denitrification rates. This may be due to the networks
inability to discriminate between values that are close together.
5.4.3. Texture 3 (Loam)
The loam dataset is made up of 102 records; of these 14 have missing data. The network
developed for this texture is ANN 3-7-20. The percentage error is between 542% - 0.17%
(Figure 5.6). Only eight of the 102 values have an error of over a 100%. This network as
well seems to have trouble predicting denitrification rates at the lower end of the scale.
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