nutrient retention

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• retention time — the average length of time water resides in a lake. May be a few days in a small artificial impoundment to many years in large seepage lakes. Long retention times result in greater recycling and greater nutrient retention with consequent effects… …   Dictionary of ichthyology

• Protein (nutrient) — This article is about protein as a nutrient. For protein as a class of molecule, see protein. For other uses, see bodybuilding supplement. Amino acids are the building blocks of protein. Proteins are polymer chains made of amino acids linked… …   Wikipedia

• food preservation — Any method by which food is protected against spoilage by oxidation, bacteria, molds, and microorganisms. Traditional methods include dehydration, smoking, salting, controlled fermentation (including pickling), and candying; certain spices have… …   Universalium

• Crop rotation — Fallow redirects here. For other uses, see Fallow (disambiguation). Satellite image of circular crop fields in late June 2001. Healthy, growing crops are green. Corn would be growing into leafy stalks by then. Sorghum, which resembles corn, grows …   Wikipedia

• Wetland — For other uses, see Wetland (disambiguation). The Florida Everglades massive wetland system in the United States saw 1.7 billion gallons of fresh water flushed from it daily and pumped into the ocean following one of the most successive water… …   Wikipedia

• Human impacts on the nitrogen cycle — Agricultural and industrial nitrogen (N) inputs to the environment currently exceed inputs from natural N fixation (Galloway 2003). As a consequence of anthropogenic inputs, the global nitrogen cycle (Fig. 1) has been significantly altered over… …   Wikipedia

• Sierra Nevada subalpine zone — The Sierra Nevada subalpine zone refers to a biotic zone below treeline in the Sierra Nevada mountain range of California, United States. This zoneis positioned between the upper montane zone (such as red fir forest) at its lower limit, and tree… …   Wikipedia

• Department of Food Science, University of Massachusetts — What is now the Department of Food Science at the University of Massachusetts was officially started on April 27, 1918. This preceded all other Food Science departments in the United States by over a year; the next closest being the Oregon State… …   Wikipedia

• Regulatory taking — refers to a situation in which a government regulates a property to such a degree that the regulation effectively amounts to an exercise of the government s eminent domain power without actually divesting the property s owner of title to the… …   Wikipedia

• Living machines — are a form of biological wastewater treatment designed to mimic the cleansing functions of wetlands. They are intensive bioremediation systems that can also produce beneficial by products such as methane gas, edible and ornamental plants, and… …   Wikipedia

• Olentangy River Wetland Research Park — The Wilma H. Schiermeier Olentangy River Wetland Research Park is an experimental wetland complex located adjacent to the campus of The Ohio State University in Columbus, Ohio, USA. Begun in 1992, the park has developed into a multitude of… …   Wikipedia