Question

41) Which fertilizers, when used in excessive amounts, cause soil pollution that spreads to neighboring water bodies and cause water pollution too?​

Answer 1

Chemical fertilizers contain phosphates, nitrates that can actually be the main reason behind water pollution. Environmental nitrogen and phosphorous contribute to the process of Eutrophication, which enriches the water surface with nutrients.

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Answer 2

Nitrogen and phosphorus-containing fertilizer are used excessively which causes soil pollution that spreads to neighboring water bodies and causes water pollution.

Explanation:

• Over-use of fertilizers can lead to soil acidification because of a decrease in organic matter in the soil. Nitrogen applied to fields in large amounts over time damages topsoil, resulting in reduced crop yields. Sandy soils are much more prone to soil acidification than are clay soils.
• Excess use of fertilizers may lead to heavy metal accumulation, eutrophication, and accumulation of phosphate and nitrate. Excessive phosphorus is a potential threat to water quality.
• High application rates of nitrogen-containing fertilizers combined with the high water-solubility of nitrate lead to increased runoff into surface water as well as leaching into groundwater, thereby causing groundwater pollution.