| Evaluation Grade | |||
Low | Moderate | High | Very High | |
Influence of Vegetation | Over 70 percent. Well developed tree cover (forest) | Between 70 - 40 percent. Tree cover relatively developed | Between 40 - 20 percent. Tree cover interbedded with poorly developed herbaceous cover constants, crops and orchards | Less than 20 percent. Denuded areas with sparse grass and shrub cover (shrubs and secondary herbaceous communities) and crops and orchards |