Roots and root hairs
Root Respiration: Importance and Applications - CID Bio-Science
Root, Board Game
All About Roots
Why do trees have such shallow root systems? - BBC Science Focus Magazine
Researchers identify a gene that regulates the angle of root
Tree Roots - Priority Trees
The Science of Root Growth
How should I plant my bare-root tree?
Tuberous Roots
Root - Wikipedia
Root Rot: What Does Root Rot Look Like, Plus Treatment
Root-knot Nematodes