Sws3022 exam 2 - Study guides, Class notes & Summaries

SWS3022 Exam 2 Questions with Correct Answers What is the degree to which organic contaminants impact soil and water quality related to? - Answer-water solubility What are the three factors that water solubility influences in organic contaminants? - Answer-mobility, persistence, and bioavailability What are the two factors that cause some organic chemicals to be able to dissolve in water? - Answer-being polar and/or electrically charged organochlorines - Answer-non-ionic, non-polar org...

SWS3022 Exam 2 Study Guide State Questions and Answers Know how to determine if water will flow between two points in a soil and the direction of flow. - CORRECT ANSWER-Water flows from high potential to low potential Know what a gradient is and how to calculate it. Know that the greater the gradient, the stronger the driving force for water movement. - CORRECT ANSWER-Difference in potential between two points divided by the distance between two points Understand that w...

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What are the important soil solution constituents of inorganic soils? -:- can contain carbon, but are not based on carbon; simple - metals, chemical nutrients, acids - all ionic What are the important soil solution constituents of organic soils? -:- compounds of carbon; dominated by C, H, and O; complex - covalently bonded - can be natural or synthetic How do ions differ from the elements in the periodic table? -:- Elements in the periodic table are electrically neutral. Ions are sta...

SWS3022 Exam Questions and Answers All Correct What happens to phosphorus when the soil is basic (high pH)? - Answer-- insoluble solids are formed (Calcium phosphates) - Ca + HPO4 = CaHPO4 - CaHPO4 will crystallize overtime and become highly insoluble What pH is preferred for plant availability/solubility? - Answer-6.5 What are the four types of phosphorus immobilization? - Answer-- low pH (Fe and Al phosphate solids) - high pH (Ca phosphate) - fixation in crystalline Fe and Al oxi...

SWS3022 Lab Exam 1 Questions and Answers What is the diameter of a sand particle? - Answer-2.0 - 0.05 mm What is the specific surface area of a sand particle? - Answer-444 cm^2/g What is the diameter of a silt particle? - Answer-0.05 - 0.002 mm What is the specific surface area of a silt particle? - Answer-100,000 cm^2/g What is the diameter of a clay particle? - Answer-<0.002 mm What are the 3 particle size fractions? - Answer-Sand, Silt, and Clay How many soil textura...

SWS3022 Exam 3 Questions and Answers All Correct Define an acid - Answer-Any substance which increases the hydrogen ion concentration in a solution. Know the two ions considered acids in soils` - Answer-Hydrogen & Aluminum Understand how aluminum contributes to soil acidity - Answer-Aluminum has the ability to facilitate the splitting of water and react with the resulting H+. Aluminum reacts with water to bind to the hydroxide, leaving the hydrogen ion not neutralized (so lots of H+'s). ...

SWS3022 Exam 1 Questions and Answers All Correct How does texture affect overall porosity? - Answer-Finer-textured soils have greater overall porosity than coarse-textured soils. Finer soils have smaller pore spaces which increase their capillarity, and allow them to hold water and gases better. How does texture affect water and gas movement in soils? - Answer-Coarse-textured soils have bigger pore spaces and smaller total porosity, allowing water and gas to move much faster. Why are the ...

SWS3022 Exam 3 Questions and Answers Chroma - Answer-Strength of the spectral color (peach to neon orange); high concentrations of Fe cause soils to have a high chroma number Sand particle size separates - Answer-Mostly visible, gritty. Quartz. 0.2-0.05 mm. Silt particle size separates - Answer-Microscopic, smooth/silky.Quartz. 0.05-0.002 mm. Clay particle size separates - Answer-Sub-microscopic, colloidal. Secondary minerals (more reactive). <0.002 mm. How does texture affect o...

SWS3022 Exam 3 Questions and Answers What is "green manure"? - Answer-When the plant dies, the fixed nitrogen is mineralized during decomposition, making it available to other plants. What is the artificial process by which atmospheric N is fixed? How much world energy is used? Also, be familiar with the fact that the product of this process is used as a foundation for the production of a number of N fertilizer types. - Answer-It's called the Haber-Bosch process. It uses 1-2 percent of t...