Q72
Why is crop rotation necessary?
A.
To increase the fertility of soil
AnswerB.
To increase the quantity of minerals
C.
To reduce the quantity of proteins
D.
To plough various types of crops
Answer: Option A
Solution
Answer: Option A
Solution:
Soil contains many minerals and salts. Some of them are used by one type of crop while others by other crops. Crop rotation will help to regain those minerals and will prevent the over exploitation of one type of mineral.