OBJECTIVE LIFE SCIENCE
PLANT PHYSIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
True
|
|
|
False
|
|
|
Either A or B
|
|
|
None of the above
|
Detailed explanation-1: -Most tree roots spread 2-3 times the radius of the canopy, and often reach out 5 times the radius of the tree canopy or more in dry conditions. So, for example, if a tree is 6m wide, the radius of the canopy is 3m. The root spread = 2 (to 3) x canopy radius = 2 (to 3) x 3m = 6m (to 9m).
Detailed explanation-2: -Although it is a popular image, it is in fact a misconception. Roots do not grow as deep as a tree is tall. The vast majority of tree roots stay within the top 50 cm of soil and extend outward two to three times the width of the canopy.
Detailed explanation-3: -Shepherd’s tree (Boscia albitrunca), native to the Kalahari Desert, has the deepest documented roots: more than 70 meters, or 230 feet, deep.