Q15 The excessive use of fertilizers increases the nutrient content of soil If these nutrients find their way - Science - Crop Production and Management

Question

Q15
The excessive use of fertilizers increases the nutrient content
of soil If these nutrients find their way to a nearby lake, then it
would result in the

A :

immediate death of all aquatic life

B :

immediate increase in fish population

C :

increase in the growth of aquatic vegetation

D :

increase in the amount of dissolved oxygen in water

Chemicals such as nitrogen and phosphorus are one of the major
nutrients that plants need to grow and survive Excess concentration
of these chemicals in a lake will increase the growth of aquatic
plants and may also cause algal blooms This process is known as
eutrophication
The correct answer is C
Why alternative A is wrong:
The increase in the amount of nutrients in a lake will trigger a
rapid growth of algae, resulting in algal blooms This algae will
use up all the oxygen present in the water body, eventually leading
to the death of all aquatic life
Why alternative B is wrong:
The increase in the amount of nutrients in a lake will trigger a
rapid growth of algae, resulting in algal blooms This algae will
use up all the oxygen present in the water body As a result, the
number of fishes present in the lake will decrease
Why alternative D is wrong:
The increase in the amount of nutrients in a lake will trigger a
rapid growth of algae, resulting in algal blooms This algae will
use up all the oxygen present in the water body As a result, the
dissolved oxygen content in water will decrease
why is Option A wrong and Option C correct???????????

Swati Sharma · Accepted Answer

Option A is incorrect as it says immediate death will occur
Well, this is not the case the death of aquatic animals do occur
but gradually
Option C is correct because fertilizers have nitrogen and
phosphorous which are required by plants There increased level will
result in increase in aquatic vegetation