Nutrient contents

Compound CAS Registry Number Formula Primary N nutrient content, P3O3 yC lyo... 

The legal basis for the sale of fertilizers throughout the world is laboratory evaluation of content as available nitrogen, phosphorus, and potassium. By convention, numerical expression of the available nutrient content of a fertilizer is by three successive numbers that represent the percent available of N, P20, and K O, respectively. Thus, for example, a 20—10—5 fertilizer contains available nitrogen in the amount of 20% by weight of N, available phosphoms in amount equivalent to 10% of P2O5, and available potassium in amount equivalent to 5% K O. The numerical expression of these three numbers is commonly referred to as the analysis or grade of the fertilizer. Accepted procedures for laboratory analysis are fixed by laws that vary somewhat from country to country. 

Economics. In contrast to NSP, the high nutrient content of TSP makes shipment of the finished product preferable to shipping of the raw materials. Plants, therefore, are located at or near the rock source. The phosphoric acid used, and the sulfuric acid required for its manufacture, usually are produced at the site of the TSP plant. As in the case of NSP, the cost of raw materials accounts for more than 90% of the total cost. Most of this is the cost of acid. 

Secondary and Micronutrients in Fertilizers The great majority of farm fertilizers are produced, marketed, and appHed with regard only to the primary plant nutrient content. The natural supply of secondary and micronutrients in the majority of soils is usually sufficient for optimum growth of most principal crops. There are, however, many identified geographical areas and crop—soil combinations for which soil appHcation of secondary and/or micronutrient sources is beneficial or even essential. The fertilizer industry accepts the responsibiHty for providing these secondary and micronutrients, most often as an additive or adjunct to primary nutrient fertilizers. However, the source chemicals used to provide the secondary and micronutrient elements are usually procured from outside the fertilizer industry, for example from mineral processors. The responsibiHties of the fertilizer producer include procurement of an acceptable source material and incorporation in a manner that does not decrease the chemical or physical acceptabiHty of the fertilizer product and provides uniform appHcation of the added elements on the field. 

In the United States, additional ramifications maybe expected from FDA s announcement of final regulations for new food labeling requirements under the directive of the Nutrition Labeling and Education Act of 1990 (2). Among other things, these regulations limit health claims that can be made on food labels. They also require new information on nutrient content, and limit the use of descriptors such as low and free in association with calories, fat levels, and other food product characteristics. 

Other expansions of FDA s authority include the Dmg Price Competition and Patent Term Restoration Act of 1984, commonly known as the 1984 Amendments or the Waxman-Hatch Act, which was passed to attain quicker marketing of safe, effective, and less expensive generic dmgs and the Safe Medical Device Amendments of 1990, which was passed to correct perceived weaknesses in the implementation of the 1976 Device Amendments. Congress further expanded FDA authority over nutrition labeling and health and nutrient content claims on food labels with the Nutrition Labeling and Education Act of 1990. 

Analysis grade refers to the primary nutrient content of a fertilizer. Nitrogen content is expressed as % elemental N. Phosphoms content is expressed as % P2O5, and potassium as % K2O, given in the order N—P—K. 

Decreased production of yolk protein resulting from inhibition of either ovarian or liver function presents the fish with a similar choice to that resulting from decreased food availability. It can produce the same number of smaller eggs, or a smaller number of eggs of normal size, but the mechanism by which that choice is made is unclear. Since the decreased nutrient content of small eggs will result in smaller larvae with a decreased survival rate, the net result in both cases may be a... 

The indirect pathway by which air pollutants interact with plants is through the root system. Deposition of air pollutants on soils and surface waters can cause alteration of the nutrient content of the soil in the vicinity of the plant. This change in soil condition can lead to indirect or secondary effects of air pollutants on vegetation and plants. 

Acid deposition refers to the transport of acid constituents from the atmosphere to the earth s surface. This process includes dry deposition of SO2, NO2, HNO3, and particulate sulfate matter and wet deposition ("acid rain") to surfaces. This process is widespread and alters distribution of plant and aquatic species, soil composition, pH of water, and nutrient content, depending on the circumstances. 

Nahr-lbsung, /. nutrient (or nutritive) solution, -medium, n. nutrient medium, -mittel, n. food nutriment, nutrient. -plasma, /. (Biol.) trophoplasm, -praparat, n, food preparation. -saft, m. nutrient juice chyle sap. -salz, n. nutrient salt (salt required for proper nutrition), -stoff, m. nutri ve substance, nutrient nutritive material, foodstuff, food, nfihrstoffarm, a. poor in food material. Nahrstoffgehalt, m. nutrient content, food content. 

Table 14.1 The nutrient content of phloem powder and study breads per 100 g ...

Subjects were randomly assigned to consume daily 70 g of normal dried rye bread (placebo group, = 30), rye bread in which 8% of the rye flour was substituted with phloem powder (low phloem, LP, group, = 30) or bread in which 14% of the rye flour was substituted with phloem powder (high phloem, HP, group, n = 15). Study breads used in our study were different in fiber, lignan and catechin content. The nutrient content of the phloem powder and... 

Generation of data on the nutrient content of agricultural products and foods forms the basis for estimating nutrient intakes of populations via dietary surveys, nutritional labelling for consumer protection, nutrition education for consumer food choice, home and institution menu planning and food purchase, and for research in nutrient requirements and metabolism, toxicant chemical composition is used to assess effects of farm management practices, crop culture, and food processing on chemical content and implications for human health. 

Much of the analytical data on the nutrient content of foods is generated using official methods of analysis (e.g. AO AC International). An evaluation of AO AC Methods of Analysis for Nutritional Labelling is available (Sullivan and Carpenter 1993). While these methods have often been studied for a variety of food matrices, applicability over the entire range of food matrices has not been formally studied in most cases. In addition, RMs are not available over the entire range of food matrices (Wolf... 

D. Vaughan and B. G. Ord, Extraction of potential allelochemicals and their effects on root morphology and nutrient contents. Plant Root Growth an Ecological Perspective (D. Atkinson, ed.), Blackwell, Oxford, 1991, p. 399. 

B. S. Rauthan and M. Schnitzer, Effects of a. soil fulvic acid on the growth and nutrient content of cucumber (Cucumis sativus) plants. Plant Soil (53 491 (1981). 

In a study of the nutrient content of silage in Switzerland, Wyss (2000) showed that using fertiliser increased the crude protein and fibre level but decreased the sugar level. This led to the conventional silage scoring lower for fermentation quality. 

Wyss, U. (2000) The influence of different farming systems on nutrient contents and on grass silage quality. Proceedings of the 13th International IFOAM Scientific Conference, Basil, Switzerland, p. 398. 

Although these studies utilizing Incorporated debris are valuable because they show the potential for allelochemlcals to be released from plant litter, they suffer from a disadvantage. The amount of debris added and Its carbon to nitrogen ratio might lead to alterations In nutrient contents In the soil as the result of proliferation or shifts In populations of micro-organisms. Thus, a control In which a material of similar C/N ratio but lacking allelochemlcals needs to be Included for such studies to be conclusive. The above studies did not Include such controls and thus are not definitive. 

Topsoil should have a loose and open structure so that it drains fast to keep the ground surface dry. At the same time, it must be able to retain enough moisture in order that plants growing in it are not constantly subjected to drought stress. The properties of interest include particle gradation, clay content, nutrient content, and retention capacity. 

Yolk colour plays a role in consumer acceptance, but the preferred colour varies in different countries. Yolk colour has no relation to nutrient content, flavour or freshness, but is often enhanced in conventional production systems by addition of synthetic pigments to the animal feed. In organic production, synthetic yolk pigments are prohibited and this normally results in paler yolks, but may also lead to greater variability in yolk colour intensity. In many European countries paler yolk colour is perceived by consumers as being associated with less natural production systems, an issue that clearly needs to be addressed by improved consumer information. 

After all the answers from the interviews had been uploaded, an expert analysed each supply chain for each of the seven defined criteria for quality and safety microbial toxins and abiotic contaminants potential pathogens natural plant toxicants freshness and taste nutrient content and food additives fraud social and ethical aspects. For example, an expert on freshness and taste would check each major step in a supply chain for tomatoes to determine if it fulfilled the definition of a CCP (HACCP, Principle 2) in relation to freshness and taste for this commodity. If the step was considered to be a CCP, the answers in the questionnaire that related to relevant substeps at this step would be reviewed, to assess the control procedures that were in use for this CCP. The expert would then fill in the text field, structuring the input to consist of the following points ... 

Sarathchandra SU, Perrott KW, Littler RA (1989) Soil microbial biomass influence of simulated temperature changes on size, activity and nutrient content. Soil Biol Biochem 21 987-993... 

Prickly pear fruit and cladodes are valued because of their high nutrient content, vitamins, and other health components (Yahia 2009a Hegwood 1990). 

Keywords Biogeochemistry, Ebro River watershed, Human settlements, Land use, Nutrient content, Physiography... 

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