What is the relationship between the area occupied by the root system and the size of the aboveground part of the plant?

There is a relationship between the size of the root and the terrestrial part of the plant. The larger and more massive the ground part, the larger the root will be for the plant to anchor, and the ability to absorb a sufficient amount of water and minerals. But in addition, environmental factors affect the size of the root system. If the plant lives in the desert or steppe, then its root can be several tens of times larger for the shoot. This is due to the fact that such a root allows you to suck in water that is deep underground.