algae in the soil (1/2) and mutualistic bacteria in the root nodules of legumes (1). Ammonium compounds in root nodules can be used by legumes to form plant protein (1/2) - lightning / electrical discharge to fix atmospheric nitrogen (1/2) 2) Nitrification (1/2) : by bacteria‚ oxidation of ammonia or ammonium compounds in soil into nitrite (1/2)‚ nitrite into nitrate (1/2) 3) Absorption (1/2) : nitrate absorption into root hairs of a legume by diffusion (1/2) and active uptake (1/2)
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91 Chapter 5 Sources of plant nutrients and soil amendments A large number of diverse materials can serve as sources of plant nutrients. These can be natural‚ synthetic‚ recycled wastes or a range of biological products including microbial inoculants. Except for microbial inoculants (biofertilizers)‚ all of these contain one‚ two or several plant nutrients in readily or potentially available forms. A certain supply of mineral and organic nutrient sources is present in soils‚ but
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m paper Chemistry Notes & Worksheet: Acids‚ Bases & Salt Name : __________________________________________________ ( ) Class : Secondary 3 Maju/Cemerlang Date : ______ August 2012 Acids Definition: Substances that release hydrogen ions (H+) when dissolved in water. Strong Acids | Weak Acids | Chemical Name | Chemical Formula | Organic acids such as citric acid‚ ethanoic acid. | Hydrochloric acid | HCl | | Sulphuric acid | H2SO4 |
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THE s-BLOCK ELEMENTS 291 UNIT 10 THE s -BLOCK ELEMENTS The first element of alkali and alkaline earth metals differs in many respects from the other members of the group After studying this unit‚ you will be able to • describe the general characteristics of the alkali metals and their compounds; • explain the general characteristics of the alkaline earth metals and their compounds; • describe the manufacture‚ properties and uses of industrially important sodium and calcium
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UNITED NATIONS ENVIRONMENT PROGRAMMME INDUSTRY AND THE ENVIRONMENT UNITED NATIONS INDUSTRIAL DEVELOPMENT ORGANIZATION TECHNICAL REPORT No 26 - Part 1 Mineral Fertilizer Production and the Environment Part 1. The Fertilizer Industry ’s Manufacturing Processes and Environmental Issues In collaboration with the INTERNATIONAL FERTILIZER INDUSTRY ASSOCIATION MINERAL FERTILIZER PRODUCTION AND THE ENVIRONMENT Part 1. The Fertilizer Industry ’s Manufacturing Processes and
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produced if he had decomposed 517.84 g of mercury oxide? 0. Iron(III) chloride‚ FeCl3‚ can be made by the reaction of iron with chlorine gas. How much iron‚ in grams‚ will be needed to completely react with 58.0 g of Cl2? 194. Sodium sulfide and cadmium nitrate undergo a double-displacement reaction as shown by the following equation: Na2S + Cd(N03)2 —* 2NaN03 + CdS What is the mass‚ in milligrams‚ of cadmium sulfide that can be made from 5.00 mg of sodium sulfide? 195. Potassium permanganate and glycerin
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An essay about cycles in biology. Jessie Dean Biological cycles are vital in many aspects of life on earth. From cycles within the body that keep organisms alive such as the cell cycle‚ Krebs cycle and the Calvin cycle to cycles that encompass many aspects of life and our planet such as the Nitrogen and Carbon cycles. The cell cycle involves actively dividing eukaryotic cells passing through a series of stages known collectively as the cell cycle. The two gap phases (G1 and G2) and S (for synthesis)
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An ecosystem is a biological environment consisting of all the organisms living in a particular area‚ as well as all the nonliving or abiotic‚ physical components of the environment with which the organisms interact‚ such as air‚ soil‚ water and sunlight. In a typical ecosystem‚ plants and other photosynthetic organisms are the producers that provide the food. (Leibold) Ecosystems can be permanent or temporary and they usually form a number of food webs. Examples of ecosystem include: Marine Ecosystems:
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in Temp(Celsius) | Observations | Open - Calcium Chloride | 24 | 30 | 6 | translucent ‚ slightly murky | Open - Ammonium Nitrate | 24 | 30 | 6 | translucent‚ slightly murky | Closed - Calcium Chloride | 24 | 18 | 6 | transparent | Closed - Ammonium Nitrate | 24 | 17 | 7 | transparent | Calculations i) Calcium Chloride: Q = (100) (4.184) (6) = 2510.4 Ammonium Nitrate: Q = (100) (4.184) (7) = 2928.8 ii) NH4NO3: (14.0067) + 4(1.00794) + (14.0067) + 3(15.9994) = 80.04336 g/m 10
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initial color and all subsequent observations were recorded in the data table. Three drops of iron (III) nitrate were added to different spots in the petri dish‚ and the resulting solution was swirled until the color was consistent. Approximately ½ pea-sized sample of potassium
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