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Topic: Nutrient

In the News (Tue 18 Jun 13)

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	Nutrient Pollution - general info
		Just as the nitrogen and phosphorus in fertilizer aids the growth of agricultural crops, both nutrients are vital to the growth of plants within the Bay and rivers.
		Nutrients from septic systems are increasing throughout the watershed as development spreads farther into the countryside, beyond the reach of sewer systems.
		Runoff from farms is generally declining as farmers adopt nutrient management and runoff control techniques, and because the overall amount of farmland is declining.
	www.chesapeakebay.net /info/nutr1.cfm (999 words)

	Unasylva - No. 185 - Forest influences - Nutrient cycling and agroforestry in Africa
		Nutrient inputs are additions originating from outside the system, such as nitrogen fixed from the air by legumes or the use of chemical fertilizers.
		Nutrient cycling refers to the transfer of nutrients already in the soil plant system from one component to another, for example the release of nitrogen from soil organic matter as ammonium or nitrate and its subsequent uptake by plants.
		Nutrient inputs from atmospheric deposition, biological nitrogen fixation and weathering of primary soil minerals are in balance with nutrient losses owing to leaching, denitrification, runoff and erosion.
	www.fao.org /docrep/w0312E/w0312e06.htm (3061 words)

	Nutrient - Wikipedia, the free encyclopedia
		Six nutrient groups exist, classifiable as those that provide boger energy, and as those that otherwise support metabolic processes in the body: Some of them are essential because they cannot be synthesized in the body and must be obtained from a food source.
		Water is an essential nutrient and is directly involved in all the chemical reactions of life.
		Nutrients having greatest potential to influence plant growth in aquatic environments is those elements needed for plant growth in proportionately large amounts (that is, macronutrients) but likely to become limiting—that is, present in amounts that could be depleted by continued growth.
	en.wikipedia.org /wiki/Nutrient (969 words)

	Workshop Curacao Eutrophication in Reef Water
		With nutrient pollution or eutrophication we mean an increase in nitrogen (usually as ammonium or nitrate) and phosphorus (as phosphate) in a natural environment.
		Nutrients are not contained cycle after cycle in the reef ecosystem, but rather taken up by the plants and animal-plant symbionts and lost again when excreted by higher trophic levels.
		Nutrients flow through the food chain and they are converted from one form to another in the process.
	www.nacri.org /greylit/GastNutrPollWorkshop.html (4439 words)

	Nutrient Cycling
		Nutrient management is defined as the efficient use of all nutrient sources and the primary challenges in sustaining soil fertility are to: 1) Reduce nutrient losses, 2) Maintain or increase nutrient storage capacity, and 3) Promote the recycling of plant nutrients.
		Nutrients are also released because the soil immediately adjacent to roots, the rhizosphere, often has a lower pH than the bulk soil around it as a consequence of nutrient uptake.
		Excess nutrient applications can be eliminated or at least significantly reduced by soil testing on a regular basis, setting realistic yield goals and fertilizing accordingly, accounting for all nutrient sources such as manure, legumes, and other amendments, and using plant tissue analysis as a monitoring tool for the fertilizer program.
	southcenters.osu.edu /soil/n_cycle.htm (5135 words)

	EPA - Ag 101, Crop Production Nutrient Management
		Nutrient management is the practice of using nutrients wisely for optimum economic benefit, while minimizing impact on the environment.
		Soil tests are used to determine soil deficiencies for nutrients such as phosphorus and potassium.
		Water quality problems can occur when nutrients are added to the soil at a time when they could be removed in surface runoff from rainfall or snow melt at rates exceeding that removed by the crop, or if applied at times that they cannot be utilized by the crop.
	www.epa.gov /agriculture/ag101/cropnutrientmgt.html (1152 words)

	Soil Fertility Management - Manure nutrient management (Site not responding. Last check: 2007-10-15)
		Approximately three-fourths of the nutrients harvested in crops grown on a farm, and in the purchased feed and supplements fed to the livestock, may be recycled back to crop fields in manure.
		Nutrient management plans for this type of farm emphasize practices designed to make the most of nutrient efficiency and achieve the maximum crop response from manure nutrients.
		Nutrient management programming most likely will result in environmental benefits, as excesses on the farm are reduced.
	agguide.agronomy.psu.edu /cm/Sec2/sec29.cfm (701 words)

	Whole farm nutrient planning - Odor and Nutrient Management Newsletter
		Livestock use only 10 to 30 percent of these nutrients, excreting the remainder as manure, which can result in a concentration of nutrients on the livestock farm and a shortage of nutrients (typically replaced by purchased commercial fertilizers) on neighboring crop farms that provided the feed for the livestock operation.
		The net result may be a nutrient imbalance on the crop farm, and an oversupply on the livestock farm.
		Nutrients arrive on livestock operations as purchased animals, fertilizer, animal feed, nitrogen (N) fixed by legume crops, and nitrates in rain and irrigation water.
	www.extension.iastate.edu /Pages/communications/EPC/Fall02/wholefarm.html (1421 words)

	New Studies Initiated by the U.S. Geological Survey—Effects of Nutrient Enrichment on Stream Ecosystems
		Nutrient enrichment is one of five national priority topics addressed by NAWQA in its second decade of studies, which began in 2001.
		Nutrient conditions—a term that encompasses sources of nutrients, their concentrations in soil and water, their transport, and their uptake by plants and animals—vary seasonally and among watersheds.
		Nutrient conditions are affected by climate, soil type, amount of ground-water discharge to streams, characteristics of the streambed, amount of riparian shading, physical disturbance of stream habitat, and biological organisms.
	pubs.usgs.gov /fs/fs11803 (2358 words)

	US FDA/CFSAN: How to Understand and Use the Nutrition Facts Label
		Instead each nutrient is based on 100% of the daily requirements for that nutrient (for a 2,000 calorie diet).
		It's easy to see which foods are higher or lower in nutrients because the serving sizes are generally consistent for similar types of foods, (see the comparison example at the end) except in a few cases like cereals.
		Nutrient Content Claims: Use the %DV to help you quickly distinguish one claim from another, such as "reduced fat" vs. "light" or "nonfat." Just compare the %DVs for Total Fat in each food product to see which one is higher or lower in that nutrient--there is no need to memorize definitions.
	www.cfsan.fda.gov /~dms/foodlab.html (2518 words)

	Soils: Nutrient Management
		Nutrient management planning as such is a relatively new term, however the principles involved are basic, sound fundamentals necessary for good management of any business.
		It is important to distinguish between uptake, or use by the growing crop, and removal, or the physical displacement of the nutrients from the field in the harvest.
		Nutrient management plans are required as part of the governmental permitting process for various animal operations in Mississippi.
	msucares.com /crops/soils/nutrient.html (920 words)

	Nutrient Solution Formulation for Hydroponic (Perlite, Rockwool, NFT) Tomatoes in Florida
		The key to successful management of a fertilizer program is to ensure adequate concentrations of all nutrients throughout the life cycle of the crop.
		Small amounts of nutrients are needed early, then the demand increases as the crop grows, especially after several clusters of fruit have been set on the plant.
		Nutrient management programs should begin with an understanding of the nutrient solution concentrations in parts per million (ppm) for the various nutrients required by tomato plants.
	edis.ifas.ufl.edu /CV216 (2349 words)

	The New Food Label
		Because few nutrient data exist for these foods, FDA believes that allowing this option will enable game meat producers to give first priority to collecting appropriate data and make it easier for them to update the information as it becomes available.
		Declaring nutrients as a percentage of the Daily Values is intended to prevent misinterpretations that arise with quantitative values.
		Claims for 10 relationships between a nutrient or a food and the risk of a disease or health-related condition are now allowed.
	www.fda.gov /opacom/backgrounders/foodlabel/newlabel.html (4857 words)

	A Brief Overview of Nutrient Cycling in Pastures
		When nutrients cycle efficiently in a pasture system, they move through various soil organisms and pasture plants, then through the grazing animals, and back to the soil again as manure and urine.
		The nutrients from these deeper soil levels are used by the plant, but become available at the soil surface once the tree leaves fall or the weeds die, decompose, and release their nutrients.
		Nutrients in urine are soluble and move in the soil solution to the roots.
	attra.ncat.org /attra-pub/nutcycle.html (4589 words)

	Virginia Nutrient Management Program (Site not responding. Last check: 2007-10-15)
		DCR works to manage both urban and agricultural nutrients found in fertilizers, manure, municipal sewage sludge and other sources so that they retain their efficient use yet don't impair the quality of Virginia's ground and surface waters.
		DCR employees are responsible for nutrient management plan approval for producers requiring a Department of Environmental Quality-issued Virginia Pollution Abatement general permit for confined animal operations.
		Virginia is a leader in implementing urban nutrient management strategies in cooperation with private industry to reduce nutrient runoff from lawns, office parks, golf courses and other developed lands.
	www.dcr.virginia.gov /sw/nutmgt.htm (705 words)

	USDA Nutrient Values (Site not responding. Last check: 2007-10-15)
		Nutrient values are available for 100 gram portions as well as two common serving sizes.
		Percent RDA is given for males and females between the ages of 25 and 50.
		To get nutrient values on a food, enter the name of the food you wish to search for in the search field.
	www.rahul.net /cgi-bin/fatfree/usda/usda.cgi (172 words)

	Nutrient Criteria Development in New Mexico
		Nutrients, such as phosphorus and nitrogen, are essential for proper functioning of ecosystems.
		Once nutrients enter a waterbody they can be taken up by aquatic vegetation and microorganisms, sorb to particles in the water column and/or sediment, or they can be transformed and released as a gas from the waterbody (denitrification).
		Unfortunately, the magnitude of nutrient concentration that constitutes an “excess” is difficult to determine and varies by ecoregion.
	www.nmenv.state.nm.us /swqb/nutrients (739 words)

	Nutrient Management (Site not responding. Last check: 2007-10-15)
		The Delaware Nutrient Management Commission (DNMC members) was established to direct the program and develop regulations pertaining to nutrient management, waste management for Animal Feeding Operations (AFOs) and National Pollutant Discharge Elimination System (NPDES) permits for concentrated animal feeding operations (CAFOs).
		Nutrient Management Relocation Program - This is a cost assistance program to assist in the transport of manure from areas of excess manure to areas in need.
		Nutrient Management Planning Program - This is a cost assistance program for the implementation of a Nutrient Management Plan for those controlling the application of nutrients to 10 acres or greater and/or for those managing Animal Feeding Operations (AFOs) with greater than 8 Animal Units requiring an Animal Waste Management Plan.
	www.state.de.us /deptagri/nutrients (414 words)

	Virginia Nutrient Management Program (Site not responding. Last check: 2007-10-15)
		They develop site-specific nutrient management plans with cooperating farmers, assist farmers with manure testing for nutrient levels, calibrate nutrient application equipment, and coordinate soil nitrate testing in agricultural crop fields.
		Nutrient management staff members teach farmers about nutrient management practices through demonstration field days, farmer meetings and individual contacts.
		Nutrient management specialists also provide plan writing assistance and support to approximately 20 counties that require farm nutrient management plans in local confined livestock zoning ordinances.
	www.dcr.state.va.us /sw/nutmgt.htm (705 words)

	Nutrient Requirements of Dairy Cattle: Seventh Revised Edition, 2001
		New features allow users to pinpoint nutrient requirements more accurately for individual animals.
		The committee also provides guidance on how nutrient analysis of feed ingredients, insights into nutrient utilization by the animal, and formulation of diets to reduce environmental impacts can be applied to productive management decisions.
		In addition, the many useful tables include updated nutrient composition for commonly used feedstuffs.
	www.nap.edu /catalog/9825.html (495 words)

	Whole-farm nutrient budgeting
		The objective is to achieve nutrient balance, such that nitrogen losses are minimized and soil test phosphorus and potassium concentrations are stabilized at desired levels.
		The two-fold purpose of the project was to field test the nutrient management portion of CROP, and to gain insight into nutrient balance on a variety of Wisconsin farm operations.
		Where nutrient imbalance exists, common causes include heavy stocking rates, high starter fertilizer application rates, under-crediting of manure and legume nutrient additions, and excess nutrient concentration (especially P) in the dairy ration.
	www.cias.wisc.edu /wicst/pubs/nutrbudg.htm (1129 words)

	Nutrient Deficiency in a Planted Tank (Site not responding. Last check: 2007-10-15)
		When it comes to analyzing nutrient deficiencies, one of the first clues to look at is to determine if the deficiency shows up mainly in old growth, or new growth.
		Some nutrients are considered "mobile", which means the plant can re-claim the nutrient from old leaves, and move them to produce new leaves.
		Nutrients which are mobile include: nitrogen, phosphorus, potassium, magnesium, and zinc.
	www.csd.net /~cgadd/aqua/art_plant_nutrient.htm (542 words)

	Nutrient density - Wikipedia, the free encyclopedia
		Firstly, nutrient density is defined as a ratio of nutrient content (in grams) to the total energy content (in kilocalories or joules).
		To calculate nutrient density (in percent), divide the number of calories or joules from one particular nutrient by the total number of calories or joules in the given food and then multiply this by 100.
		Thirdly, nutrient density is understood as the ratio of the nutrient composition of a given food to the nutrient requirements of the human body.
	en.wikipedia.org /wiki/Nutrient_density (226 words)

	Nutrient Management for Georgia Agriculture
		This nutrient mass balance is an important part of a CNMP and important to understand for your farming operation.
		Many of the nutrients needed to grow your crops are already present on your farm in the soil, in animal manures, or in crop residues.
		After evaluation of the nutrient supply on your farm and the nutrient needs of your crops, you may find that the balance of nutrients is not ideal.
	pubs.caes.uga.edu /caespubs/pubcd/B1185.htm (2028 words)

	Figuring Out Food Labels
		Your body needs the right combination of nutrients, such as vitamins, to work properly and grow.
		These are often similar, but kids need may need more or less of certain nutrients, depending on their age and size.
		Fat is an important nutrient that your body uses for growth and development, but you don't want to eat too much.
	kidshealth.org /kid/stay_healthy/food/labels.html (690 words)

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