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what are the harmful effects chemical fertilizers
Waterway Pollution The use of chemical fertilizers on crops can have adverse effects on waterways caused by chemical run off of the excess fertilizer. The over-abundance of nutrients in the water reduces the amount of oxygen. [ The existing organisms living in the water use up the oxygen that is left. The result is oxygen depletion causing the fish to die. Chemical Burn
Chemical fertilizers are high in nutrient content such as nitrogen. Over-application of chemical fertilizer to plants may cause the leaves to turn yellow or brown, damaging the plant and reducing crop yield. This condition is known as chemical leaf scorch. Leaf scorch can cause the leaves of the plant to wither and may cause the plant to die. Sponsored Links Organic Farming Learn how to farm organically Books, magazine on crops, livestock Increased Air Pollution Excess nitrogen used in crop fertilization can contribute to the release of greenhouse gases such as carbon dioxide and nitrous oxide into the atmosphere. This effect is caused by using a greater amount of chemical fertilizer than the plants can readily absorb. According to the National Oceanic and Atmospheric Administration (NOAA) Climate Monitoring and Diagnostics Lab, excess greenhouse gases trapped in the atmosphere may be contributing to the increase of land and ocean surface temperatures. Soil Acidification The over-use of chemical 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. Clay soils have an ability to buffer the effects of excess chemical fertilization. Mineral Depletion There is an increasing concern that continuous use of chemical fertilizers on soil depletes the soil of essential nutrients. As a result, the food produced in these soils have less vitamin and mineral content. According to data produced by the U.S. ]
Expert answered|marrenosi|Points 48|
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Asked 7/12/2012 6:57:47 AM
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say the life story of amelia earhart
Weegy: Amelia Earhart was born on July 24, 1897, in Atchison, Kansas, in America's heartland. She spent much of her early childhood in the upper-middle class household of her maternal grandparents. [ Amelia's mother, Amelia "Amy" Otis, married a man who showed much promise, but had never been able to break the bonds of alcohol. Edwin Earhart was on a constant search to establish his career and put the family on a firm financial foundation. When the situation got bad, Amy would shuttle Amelia and her sister Muriel to their grandparents' home. There they sought out adventures, exploring the neighborhood, climbing trees, hunting for rats, and taking breathtaking rides on Amelia's sled.Amelia Earhart Biography - Facts, Birthday, Life Story - Biography.com › People ] (More)
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