Question 39 (2 points) Wild and scenic rivers, protected by the Wild and Scenic Rivers Act of 1968 permits limited mining and logging only more than 100 feet from water's edge allows double the amount of fish that can be caught above state regulations. protect these regions like national parks limits dams to no more than 5 miles apart Question 40 (2 points) The National Park Service struggles to maintain a balance between hunting and development of resorts in national parks mining and logging in national parks and protection of the unique ecosystems hunting in national parks and ecotourism protecting unique ecosystems and permitting public access Question 41 (2 points) Which of the following farming practices would be expected to produce the least nutrient leaching, and thus contribute most to soil sustainability? deep plowing, no irrigation, and the use of inorganic fertilizers deep plowing, irrigation, and the use of inorganic fertilizers no plowing, no irrigation, and the use of organic fertilizers no plowing, irrigation, and the use of organic fertilizers

Let's analyze each question step by step. ### Question 39 The question asks about the provisions of the Wild and Scenic Rivers Act of 1968. The correct answer should reflect the main purpose of the act, which is to protect certain rivers for their scenic, recreational, and ecological values. - **Permits limited mining and logging only more than 100 feet from water's edge**: This is a correct statement as the act aims to protect the rivers from direct impacts of mining and logging. - **Allows double the amount of fish that can be caught above state regulations**: This is incorrect; the act does not allow for increased fishing limits. - **Protect these regions like national parks**: This is partially true, as the act does aim to protect rivers similarly to national parks, but it is not the primary focus. - **Limits dams to no more than 5 miles apart**: This is incorrect; the act does not specify a distance between dams. **Correct Answer**: Permits limited mining and logging only more than 100 feet from water's edge. ### Question 40 This question addresses the balance the National Park Service must maintain. - **Hunting and development of resorts in national parks**: This is a conflict but not the primary focus of the National Park Service. - **Mining and logging in national parks and protection of the unique ecosystems**: This is a significant concern as mining and logging can threaten ecosystems. - **Hunting in national parks and ecotourism**: This is a concern but not as critical as the previous option. - **Protecting unique ecosystems and permitting public access**: This is a fundamental balance that the National Park Service must maintain. **Correct Answer**: Protecting unique ecosystems and permitting public access. ### Question 41 This question is about farming practices and their impact on nutrient leaching and soil sustainability. - **Deep plowing, no irrigation, and the use of inorganic fertilizers**: Deep plowing can lead to increased erosion and nutrient leaching. - **Deep plowing, irrigation, and the use of inorganic fertilizers**: This combination is likely to cause significant nutrient leaching. - **No plowing, no irrigation, and the use of organic fertilizers**: This practice is likely to minimize nutrient leaching and enhance soil sustainability. - **No plowing, irrigation, and the use of organic fertilizers**: While organic fertilizers are beneficial, irrigation can still lead to leaching. **Correct Answer**: No plowing, no irrigation, and the use of organic fertilizers. ### Summary of Answers - **Question 39**: Permits limited mining and logging only more than 100 feet from water's edge. - **Question 40**: Protecting unique ecosystems and permitting public access. - **Question 41**: No plowing, no irrigation, and the use of organic fertilizers.