Question

what is the importance of using fertilizers in limited quantity

Answer 1

the importance of using fertilizers in limited quantities are:
(1) it will reduce water pollution and,
(2) it will also decreases the death of aquatic animals living in the pond, lake, river because when the fertilizers are washed away then they go there which is harmful for aquatic animals.

Answer 2

We need to use the fertilisers in limit as they destroy or decrease the fertility rate of the soil.

And this is also a root cause of many soil problems.