| So deep are some of the main canyons, like the Apurimac and the Cotahuasi, that their floors are arid or semi-arid. |
| Most of the specimens examined were taken in semi-arid habitats where the dominant plants were cactus, weeds and bushes. |
| The semi-arid highlands surrounding the capital rely almost entirely on replenishment by rainfall. |
| Alfalfa makes a seed crop in profitable amount only in our semi-arid regions. |
| Though not native, this is the commonest kind, in the interior and semi-arid regions, and most valued for forage. |
| In the semi-arid context, dunes can revegetate quite naturally and quickly once the initial disturbance has been removed. |
