ESP10_midterm_WQ12_FormB_key

ESP10_midterm_WQ12_FormB_key - ESP 10 Mid-TERM STEP 1...

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ESP 10. Mid-TERM STEP 1. Bubble in your student id on Scantron STEP 2: Bubble in your test form. This exam is FORM B STEP 3. Answer the Multiple Choice and T/F (True/False) on the Scantron. STEP 4. Write your name on this sheet . Answer the written questions, tear off this sheet and turn in this sheet. Continue writing on the back. Failure to complete any of these boldfaced steps will cost you 3 points. Questions 1-6 are worth 9 points each. 1. a. Draw the Nitrogen cycle, including natural and industrial sources. 5 points for cycle: possible points: 1 pt industrial fixation 1 pt atmospheric N 1 pt animal urea 1pt N- fixing plants/bacteria 1 pt electrical storms 1 pt N passing through plants/ecosystems b. Though the atmosophere is 79% Nitrogen, it is still one of the limiting nutrients in ecosystem productivity. Why is this the case? It is not in a usuable form. It needs to be fixed into a usuable form either by N-fixing plants, lightning, or N-fixing bacteria in roots and soil. 2 points c. How have we overcome the limitation of Nitrogen in our agricultural systems? We have overcome this limitation by developing N-rich fertilizers. 2 points 2. Name 3 early environmental laws that form the foundation of our environmental policy. Approximately what time period were they enacted? And what are the main points of each legislation? 3 points for each law with complete information: 1 point for name, 1 pt for time period, 1 pt for main points NEPA – National Environemental Policy Act 1969 – formed the backbone of the environmental policy. Created the Environmental Impact Statement. Clean Water Act 1970 – regulate and prohibit dumping into the nation’s waterways, streams, rivers, and lakes Clean Air Act 1972 – regulate air pollutants and set up standards for air quality attainment Early legislation from the 1900-20’s, such as Black Bass Act and Lacey Act, received only partial credit of 1 point. 1
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3. a. What are three practices that contributed to the success of the Green Revolution? Plant breeding (high yield varieties), chemical inputs (fertilizers, pesticides, herbicides), and irrigation. 1 point each. b. Name two reasons why the Green Revolution has not been as successful in Africa as in some other parts of the world. 1. Water for irrigation in relatively dry regions to achieve environmental certainty ; 2. Energy for the chemical applications, and 3. Lack of money to afford proprietary crop lines. Less good but also acceptable was that soils are old and depleted in Africa. 1.5 points each for any two. c. Name two environmental costs that have been associated with the success of the Green Revolution. Salinization, pesticide resistance, overdrawing groundwater, eutrophication, various problems with crop varieties (declining yield, need to buy seed each year, need seed distribution networks, loss of farmer independence/farm aggregation, more dependence on few crop varieties). Any 2 of about 1.5 points for each. 4. a. What cabinet-level agencies in the US Federal Government are directly responsible for
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ESP10_midterm_WQ12_FormB_key - ESP 10 Mid-TERM STEP 1...

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