Trough underground aquifers, extensive water lines spanning hundreds of miles or desalinization plants.
from the sea
Because there is no water in polar regions
In a desert, irrigation involves the controlled supply of water to support plant growth. When the irrigated water evaporates under the hot desert sun, it can lead to the concentration of salts and minerals in the soil, which can affect plant growth and soil fertility. Over time, this process can contribute to the formation of saline soils in desert regions.
It can if you have enough irrigation water supply.
An oasis !
oasis
A fertile tract in a desert, where the water table approaches the surface.
The question essentially answers itself, since "desert" implies a scarcity of water, while "hydroponics" is a system in which water can be contained and conserved.
an oasis say it with me OASIS =\
An oasis
You mean tap water? Some regions in Mexico are quite hot and receive a great deal of heat from the sun. To cut on maintenance costs -- pumps could be damaged from overheating -- the municipality would rather pump water during the night. Besides, most homes and buildings in Mexico have a water cistern due to poor reliability on the water supply.
The water supply in this desert is basically nonexistent.