| Since the area protected is directly related to the height of the shelterbelt, the planting of tall trees is recommended wherever possible. |
| These factors will determine proper shelterbelt location and species selection, he says. |
| Similarly, it was unclear how the planting and performance of shelterbelt trees are being monitored under the shelterbelt program. |
| The crucial trees providing the shelterbelt proved vulnerable, three years later, to a single hurricane. |
| Avoid any access roads or openings in the shelterbelt which will allow the prevailing winds to blow unchecked across the field. |
| While some xerophilous grasshoppers became scarce within the shelterbelt system, others, e.g. Calliptamus italicus, increased in importance. |
