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Topic: Plant nutrition

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	Plant Nutrition & Nutrients K-12 Experiments for Lesson Plans & Science Fair Projects
		Fertilizer studies are based on careful analysis of plant needs and are carried on in all parts of the world where plants are grown for food and industry.
		For example, if the fertilizer package reads (15-3-3), the first number is the percentage of nitrogen for plant leaf growth, the second number is the percentage of phosphate for fruit or flower growth, and the third number is the percentage of potash (potassium carbonate) for the root growth.
		Calcium: is needed in the plant to promote early root formation and is responsible for the cementing material between cells of the plant for growth.
	www.juliantrubin.com /encyclopedia/botany/plant_nutrition.html (3010 words)

	WHAT IS PLANT NUTRITION?
		Plants use inorganic minerals for nutrition, whether grown in the field or in a container.
		Plant nutrition is a term that takes into account the interrelationships of mineral elements in the soil or soilless solution as well as their role in plant growth.
		A more holistic approach to plant nutrition would not be limited to nutrients essential to survival but would include mineral elements at levels beneficial for optimum growth.
	retirees.uwaterloo.ca /~jerry/orchids/nutri.html (2302 words)

	Plant nutrition - Wikipedia, the free encyclopedia
		Plant nutrition is the study of the chemical elements that are necessary for plant growth.
		Some elements are essential, meaning that the absence of a given mineral element will cause the plant to fail to complete its life cycle; that the element cannot be replaced by the presence of another element; and that the element is directly involved in plant metabolism (Arnon and Stout, 1939).
		Plant nutrition is a difficult subject to understand completely, partially because of the variation between different plants and even between different species or individuals of a given clone.
	en.wikipedia.org /wiki/Plant_nutrition (881 words)

	Plant Nutrition
		Plants evolved in an atmosphere with far greater amounts of carbon dioxide than today which is around one percent of the total atmospheric gases.
		As well, nitrates in the plant sap are reduced by bacteria to nitrite, which is toxic to the consumer of the plant, animal, or man, particularly juveniles.
		However, in plant nutrition it is the companion to phosphorus and stimulates the assimilation of phosphorus by plants.
	www.sturmsoft.com /Writing/guide_to-gardening/plant_nutrition.htm (3987 words)

	Plant Nutrition
		The Laws of Minimum and Maximum hold that the level of production and health of a plant can be no greater than that allowed by the most limiting of these essential growth factors, either in terms of deficiency or excess of any one or combination of these factors.
		The cycles that permit nutrients to flow from the soil to the plant are all interdependent, and proceed only with the help of the soil community.
		An imbalance of the 16 essential elements is the primary reason plants are attacked by disease and insects. When the imbalance persists, it is proper to consider a foliar feeding of the deficient element from a sources that will supply only the needed element.
	www.vitech1.com /index_files/plantdata.htm (328 words)

	progressive gardens
		Plant nutrition is a term that takes into account the interrelationships of mineral elements, biostimulants, and organisms in the soil or soilless solution as well as their role in plant growth.
		With the understanding of these respective plant requirements and environments being furthered everyday by the scientific community and the increasing collective education of the public regarding these concepts, it is possible to provide specific materials to enhance specific plant processes on a commercial and individual level.
		Plants use energy via active transport and other processes to move water and nutrient through cells up to the leaves where, through the process of photosynthesis, these elements are converted to sugars and starches which are, in turn, sent back down to the root zone for potential storage.
	www.progressivegardens.com /growers_guide/plantnut.html (7791 words)

	Plant Hormones/Nutrition
		Auxin moves to the darker side of the plant, causing the cells there to grow larger than corresponding cells on the lighter side of the plant.
		is the plant response to the relative amounts of light and dark in a 24 hour period, and controls the flowering of many plants.
		Plant Biology (University of Maryland) Text, outlines, and images that are part of a general botany course.
	www.emc.maricopa.edu /faculty/farabee/BIOBK/BioBookPLANTHORM.html (2442 words)

	Hort 306 - READING 31-2
		Plant nutrition was thus considered as similar to animal nutrition, both plants and animals feeding upon complex organic bodies.
		Two important plant nutrition-related controversies were broached by Liebig: the controversy concerning the source of C and that concerning the source of N in plant nutrition.
		The evolution of plant nutrition theory has been outlined from the fundamental observations of ancient writers, who believed that manures produced better crops, to the time of Justus von Liebig, when visual observations were merged with the chemistry of the day.
	www.hort.purdue.edu /newcrop/history/lecture31/r_31-2.html (5039 words)

	MU Delta Center Plant Nutrition
		Plants with nitrogen deficiency are often light green or yellow in color.
		IThe effect of plant population and planter skips on N response in grain sorghum was also studied at the Delta Center (Grain sorghum N).
		Plants that are deficient in S are usually light green or yellow in color with similar symptoms as N deficiency.
	plantsci.missouri.edu /deltacrops/plant_nutrition.html (1631 words)

	Plant Nutrition Guide
		As plants are set in the field, apply 10-52-10 at rate of 3 kg per 1000 m of row or add 250 g to 100 L of water in the transplanting solution.
		When plants are well established, the foliage can efficiently use high concentrations of nutritional sprays, therefore 20-20-20 at a rate of 10 – 15 kg/ha is recommended.
		When plants are 6 – 8 cm high, apply one or two sprays of 15-30-15 at a rate of 5 kg/ha.
	www.plantprod.com /EN/catalogue/02PlantNutrition.html (3517 words)

	Plant Nutrition
		Plant cells in these roots begin to dehydrate and collapse, and the plant roots are "burned" or dried out to a point where they cannot recover.
		A healthy plant is composed of 75-90% water, which is used for the plant's vital functions, including photosynthesis, support (rigidity), and transportation of nutrients and sugars to various parts of the plant.
		Grow plant materials that are native or are known to be winter-hardy in your area.
	www.mastergardenproducts.com /gardenerscorner/plant_nutrients.htm (6292 words)

	1.1.6 A discussion of plant nutrition
		That the plant must operate within and as such is constrained by an array of existing environmental factors such as climate and weather, the atmospheric concentration of carbon dioxide (0.03%), duration and intensity of light, the seasons, limiting edaphic factors, etc.
		Plants are fed naturally through the soil ecosystem and not primarily via soluble salts in the soil water.
		Nitrogen added as a fertilizer or plant nutrient may be in the form of pentavalent (oxidized) nitrogen such as a nitrate or in the trivalent (reduced) form such as ammonia or urea.
	www.plantsfood.com /plantnutrition.htm (3262 words)

	Plant Nutrients
		Sixteen chemical elements are known to be important to a plant's growth and survival.
		Since plants get carbon, hydrogen, and oxygen from the air and water, there is little farmers and gardeners can do to control how much of these nutrients a plant can use.
		Nitrogen is a part of chlorophyll, the green pigment of the plant that is responsible for photosynthesis.
	www.agr.state.nc.us /cyber/kidswrld/plant/nutrient.htm (1118 words)

	Plant growth and nutrition, Botany Course, Master Gardener Training, Extension Service, Oregon State University
		Plant nutrition refers to a plant's need for and use of basic chemical elements.
		Plants produce their own food from water, carbon dioxide, and solar energy through photosynthesis.
		Plants also may absorb different nutrients as flower buds begin to develop than they do during periods of rapid vegetative growth.
	extension.oregonstate.edu /mg/botany/nutrition.html (349 words)

	Plant Nutrition (Site not responding. Last check: )
		Both ammonium and nitrate are important plant nitrogen sources and are commonly found in salt forms in fertilizers.
		Fertilizers will increase plant growth only if the plant is deficient in the nutrient applied and other growth factors (such as soil compaction, water stress or water-logging, insect and disease problems, and weed competition) are not also limiting plant growth.
		From a nutritional perspective, the primary difference between manufactured and organic soil amendments/organic fertilizers is the speed at which nutrients become available for plant use.
	www.ext.colostate.edu /pubs/garden/07730.html (1500 words)

	Plant Nutrition
		Plants are anchored to the ground and subjected to whatever the environment has to offer them; they cannot move to a more hospitable location.
		Plants often have several different ways of accomplishing the same step in a metabolic pathway.
		This metabolic flexibility in plants is perhaps best illustrated when genetic engineering is used to knock out supposedly critical enzyme activities and the resulting transgenic plants are able to grow and develop more or less normally.
	www.ans.kobe-u.ac.jp /english/gakka/seibutsu/eiyou.html (181 words)

	Cyberconference: Plant Nutrition and Fertilizers
		To be an essential element, the nutrient element must be either directly involved in the metabolism of the plant or it must be necessary for the plant to complete its life cycle.
		Leaves of mineral-deficient plants tend to be small and pale in color (chlorotic) and sometimes have dead areas at the tips and margins or between the veins.
		In nutrition demonstrational trials a new fertilizer may be compared to the standard fertilizer treatment at the nursery.
	www.greenbeam.com /features/cyb011501a3.stm (1911 words)

	Plant Nutrition vs Plant Fertilization (Site not responding. Last check: )
		Plant nutrition refers to the needs and uses of the basic chemical elements in the plant.
		Fertilization is the term used when these materials the plant needs, but may be limited, are supplied to the environment around the plant.
		The latter six elements are used in relatively large amounts by the plant and are called macronutrients.
	www.nulex.com /plantnut.htm (200 words)

	PLANT NUTRITION 101-1
		A nutrient may or may not have the same mobility in the plant as in the soil.
		Nitrogen is mobile in the plant which causes the yellowing to be seen in the older leaves, and the central vein green.
		Iron, which is immobile in the plant, shows up as yellowing of the newer leaves on a stem, with the veins remaining green.
	home.att.net /~oc_crfg/plant-nutrition-1.htm (519 words)

	Actagro Organic Acids > Soil Organics and Plant Nutrition
		Plant growth hormones have also been identified within humin and this helps to explain the growth stimulation associated with this fraction.
		By using the types and ratios of naturally occurring soil organics, plant nutrients from Actagro are protected from tying up in the soil, maintained in a form that can be readily absorbed into the plant, and serve as a buffer between plant roots and harmful salts and toxins.
		Nutrient uptake in plant roots is virtually impossible in the absence of soil humus.
	www.actagro.com /php/organics.php (2046 words)

	USU CROP PHYSIOLOGY LABORATORY: TEACHING
		Plant nutrition is the study of how plants acquire and utilize essential mineral elements from their environment.
		Plants have had to develop mechanisms to concentrate elements from dilute solutions without accumulating toxic amounts of other elements.
		Plant nutrition includes the study of nutrient transformations at the root surface, but does not include the study of nutrient reactions in soils.
	www.usu.edu /cpl/teaching_PNutrition.htm (426 words)

	Plant Nutrition
		These nutrients are found in air and water and in a process called photosynthesis; plants use energy from the sun to change carbon dioxide (CO2-Carbon and Oxygen) and water into starches and sugars.
		All these are important for plants, but the most important of these are fertilizers, because they are the life line of plant, not only provide plant nutrients and if organic fertilizers will be used for soil application it also improved the soil structure (porosity/aeration, water retention etc).
		Although possessing the advantage of quick action, the amount of fertilizer that can be distributed in a foliar dressing is limited by the sensitivity of the leaves to osmotic agents such as dissolved salts or (somewhat less) to organic chemicals such as urea.
	www.simplyhydro.com /plant_nutrition.htm (1826 words)

	Fertilizers & Plant Nutrition
		Typically, healthy plants are incinerated under controlled conditions and the mineral content in the ash is determined.
		Greatly simplified, depending upon the pH, a mineral can be insoluble and unavailable to the plant, soluble, but in a form that is difficult for the plant to readily absorb, soluble and in a form that the plant can absorb with ease, or so soluble and concentrated that it can be toxic.
		Recognizing the importance of pH in the overall equation of plant nutrition, the blend developed for Michigan State University's study was designed to provide the proper pH when used with pure water.
	www.firstrays.com /fertilizers.htm (1936 words)

	U.S. Plant, Soil and Nutrition Research : News & Events
		James Russell, rumen microbiologist with the U.S. Plant, Soil and Nutrition Research Unit, was selected as the 2005 USDA-ARS North Atlantic Area Senior Scientist of the Year for his outstanding research on the role of microbes in ruminant nutrition.
		Dr Ed Buckler, plant geneticist with the U.S. Plant, Soil and Nutrition Research Unit, received the Herbert L. Rothbart Outstanding Early Career Research Scientist Award for 2004 for his research on pioneering genetic approaches that let researchers identify individual genes controlling complex agronomic traits.
		The colloquium attracted 1200 scientists from over 50 countries and addressed both basic and applied research issues related to plant nutrition and plant responses to the environment.
	www.ars.usda.gov /News/News.htm?modecode=19-07-05-00 (195 words)

	Tropical Plant Database
		This Tropical Plant Database is continuously under construction as we continue to add more rainforest plants which are under research and update the information on the plants in the database.
		The individual plant database files are linked through various menus and pages to enable both professional readers and readers new to medicinal plants easy access to search the available plant information.
		The plants described in the Tropical Plant Database are not intended to treat, cure, diagnose, mitigate or prevent any disease and no medical claims are made.
	www.rain-tree.com /plants.htm (506 words)

	Tropica
		PLANT NUTRITION liquid therefore supplies the nutrients plants easily run out of and which plants ideally absorb via the leaves.
		PLANT NUTRITION liquid is added each week when changing the water.
		Note, however, that PLANT NUTRITION liquid is a fertilizer and not a medicine for dying plants.
	www.tropica.com /article.asp?type=news&id=686 (254 words)

	Georgia-Pacific Plant Nutrition - News - Press Releases
		Notice that Nitamin plants are fuller and bushier and the larger tops fill in the middle row area whereas bare soil can be seen with the grower fertilizer program.
		The carrots were grown over the winter months, and applying all of the Nitamin at planting was not as effective as split Nitamin applications due to the long growing season.
		Nitamin was applied either all at planting (AP) or in three split applications with one-third applied AP and the remaining two-thirds applied in January and March.
	www.gp.com /plantnutrition/newsRelease.aspx?NewsID=4901 (1659 words)

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