Excess use of nitrogen fertilizers does not lead to:
A. pest problems
B. growth problems
C. fruiting problems
D. flowering problems

Hint: Excess Nitrogen in the surroundings can cause an impact to our ability to breathe, can limit visibility and also affect plant growth.The nitrogenous fertilizer industry involves the production of synthetic ammonia, nitric acid, ammonium nitrate, and urea. Synthetic ammonia and nitric acid are mainly used as intermediates in the formation of ammonium nitrate and urea fertilizers.


Complete Answer:
Nitrogenous fertilizers used to leach away from the soil without any problem because of their high solubility in water and thereby pollute the water bodies. Nitrogen leaching is a natural process, it takes place when nitrogen leaves the soil in drainage water. Nitrate is generally soluble and mobile. There is no problem whenever it is within the root-zone, but once it comes into the groundwater and other freshwater bodies, it becomes an environmental pollutant.
Actually, Nitrogen fertilizers do not lead to any pest problem however it leads to various other bad causes to the environment.
Excess Nitrogen in the surroundings can cause an impact to our ability to breathe, can limit visibility and also affect plant growth.
Nutrient pollution is one of America's most highly spread, costly and challenging problems of the environment, and it is affected by excess nitrogen and phosphorus in the air and water.

Hence, Option A is correct.

Note: Nitrogen fertilizers do not lead to any pest problem however it leads to various other bad causes to the environment. It becomes an environmental pollutant if it comes in contact with groundwater and any other freshwater bodies.Organic fertilizers which are usually high in nitrogen involve urea, which is derived from urine, feathers, dried blood and blood meal.