1
They are supplementary systems of agriculture in arid and semiarid regions.
2
The alkali conditions in the arid or semiarid regions of the West are thus produced.
3
World-conscious survey of low-tech food production in semiarid regions.
4
To-day, current events point to the arid and semiarid regions as the chief dependence of our modern civilization.
5
In the semiarid regions of little rainfall, shortgrasses, less than a foot and a half tall, had evolved.