Sentences with phrase «excess nitrogen fertilizer»

And excess nitrogen fertilizer applied to the fields of feed corn grown to satisfy the world's livestock runs off into streams and rivers, sometimes flowing to coastal waters where it creates large algal blooms and low - oxygen «dead zones» where fish can not survive.

Excess nitrogen fertilizers from the field can flow into bodies of water.

Not exact matches

The increase in dead zones is attributed to excess inputs of nitrogen from fertilizers, sewage, and other human sources.

In a recent study, engineering researchers at Waterloo found that small wetlands have a more significant role to play than larger ones in preventing excess nutrients like nitrogen and phosphorus from fertilizer from reaching waterbodies such as the Great Lakes.

Their results showed that farmers there use about 525 pounds of nitrogen fertilizer per acre (588 kilograms per hectare) annually — releasing about 200 pounds of excess nitrogen per acre (227 kilograms per hectare) into the environment.

However, if one considers the enormous increase of reactive nitrogen in our biosphere, due to the use of synthesized fertilizer and the burning of fossil fuels, its impact is not part of the analysis, even tough this increase shows up in the eutrophication (nutrient enrichment) of open waters all over the world, resulting in excess algae, in some areas causing large algae blooms (as where they are going to hold the sailing regattas during the Olympics), red tides and dead zone, as the 8000 square mile dead zone in the Gulf of Mexico.

Statistics show that from 2003 to 2005, annual corn yields in parts of the Midwestern United States and north China were almost the same, even though Chinese farmers used six times more nitrogen fertilizer than their American counterparts and generated nearly 23 times the amount of excess nitrogen.

Vast quantities of excess fertilizers wash off fields each year, polluting huge watersheds; as just one example, each summer an oxygenless «dead zone» spreads from the mouth of the Mississippi River, fueled by excess nitrogen from upstream.