To reach water deep down
no
All trees have long roots which penetrates deep into the ground and as water is present there, the roots absorb water from there and transport it to the tree no matter how long or huge the trees are.
yes, the desert plant have long roots to collect water. Some desert plants have shallow roots that form a dense web just below the surface of the soil to collect water even from light rainfalls.
Long roots of desert plants penetrate deep in the soil in search of capillary water and absorb it for the plant's survival
Creeping charlie, philedandron types, Mother In Law plant,
No, not unless the roots are very very long.
date tree roots can be 50 meters long
Tall Trees need to be have long roots because the xylem and the phloem of the tall trees is long and heavy. Also All trees use roots for gathering nutrients from the ground. In the woods tree roots can be much longer than the width of its canopy. Trees also rely on the roots to support the trees enormous weight of the structure above the ground. They anchor the tree firmly in the soil to hopefully withstand all that nature can throw at it including wet soil and high winds.
Trees usually cannot survive in the cold tundra as the ground is frozen solid a few inches below the surface and stays frozen even in summer. Roots cannot penetrate this frozen soil. In the desert, however, trees do not have that problem and area able to send their roots deep into the soil to find water.
Having spread out roots under the ground which are long.
Any tree that has long roots.
No, there are not a lot of trees in a desert.