Research Article
Fuzzy Logic Tool to Forecast Soil Fertility in Nigeria
Table 1
Input variables with their linguistic functions showing minimum & maximum values.
| | INPUT | LEVEL | MIN VALUE | MAX VALUE |
| | NITROGEN | LOW | -1 | 20 | | | ADEQUATE | 20.1 | 41 | | | HIGH | 41.1 | 70 | | | EXCESSIVE | 70.1 | 100 |
| | PHOSPHORUS | LOW | -1 | 20 | | | ADEQUATE | 20.1 | 40 | | | HIGH | 40.1 | 100 | | | EXCESSIVE | 100.1 | 150 |
| | POTASSIUM | LOW | 0 | 150 | | | ADEQUATE | 150.1 | 250 | | | HIGH | 250.1 | 800 | | | EXCESSIVE | 800.1 | 1500 |
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