Which of the following is not a principle of crop rotation?

A. deep-rooted crops should be followed by shallow-rooted crops
B. a period of fallow must be provided in the course of the rotation
C. a leguminous crop should be included in the system
D. crops that can be attacked by the same pest should not follow each other

Correct Answer:

Option B – a period of fallow must be provided in the course of the rotation