Question

List out various chemical fertilizers.

'Over use of chemical fertilizers is dangerous' Give Reason.​

Answer 1

Answer:

because It destroy soil fertility

it decreases the underground water level

Answer 2

Explanation:

While fertilizer is generally a good thing for most plants, there is certainly too much of a good thing. The nutrients fertilizer provides to plants can also damage them if used in excess. But the damage from the misuse of fertilizer doesn't stop at your plants. It creates problems for the environment too, especially aquatic life.

Root Burn

Root burn is a condition in which the roots of plants suffer damage from the overuse of fertilizers. According to Optimara/Holtkamp Greenhouses, low-quality fertilizers often contain Urea, which is a source of nitrogen. It is not organic and some plant roots are sensitive to it. But over fertilizing with high-quality fertilizers can also lead to root burn due to an overabundance of soluble salts in the soil. The salts essentially burn the roots, and even sometimes the foliage. Plants that suffer from root burn become stunted, wilted and are often unable to flower. In severe cases of root burn, the roots may not be able to carry any water to the plant.

Environmental Issues

Excessive fertilizer that washes into storm drains eventually makes its way into bodies of water, such as rivers and lakes, causing pollution. Although the environmental impact is considerably larger from the overuse of fertilizers on farms -- simply due to the amount they use -- it's also a problem from fertilizer use in home gardens. The misuse of fertilizer often has negative effects on fish and other aquatic animals. Algae feed off of the nutrients in fertilizers, using up oxygen that fish and other animals need. Additionally, ammonia released by fertilizer is harmful to fish.

Diminished Plant Health

While the addition of nutrients found in fertilizer increases plant growth, too much fertilizer can negatively affect their health. For example, according to the University of Georgia Extension, over fertilizing rabbiteye blueberries results in lower quality fruit. While Washington State University reports that over fertilizing sunflowers can cause weak stems and fewer flowers.

Pests and Diseases

Plants that produce greener, more lush leaves because of over fertilization may attract more pests, according to licensed arborist Dennis Panu. The increased vigor of the foliage can attract unwanted insects, such as aphids, which feed on the leaves. The University of Georgia reports that too much fertilizer on turfgrass can increase the likelihood that the grass will develop brown patch, a type of fungus