Which is NOT an example of a major human alteration to the global nitrogen cycle?
A) animal waste from agriculture
B) combustion of fossil fuels
C) production of nitrogen fertilizers
D) planting of nitrogen-fixing crops
Correct Answer:
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Q20: Current atmospheric carbon dioxide levels are approximately
A)
Q21: Nitrogen fixation in the soil is carried
Q22: The burning of fossil fuels affects the
Q23: What form of nitrogen reacts with water
Q24: Choose the correct process of nitrogen
Q26: Nitrogen mineralization in the soil is primarily
Q27: Describe the path of nitrogen as it
Q28: Nitrogen mineralization is the process by which
A)
Q29: The chemical process NH4+
Q30: Where does phosphorus originate in the phosphorus
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