11 mark
Which of the following is not a major source of nitrates in the environment?
Fertiliser application
Animal waste
Lightning strikes
Weathering of rocks
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The Nitrogen Cycle (College Board AP® Environmental Science): Exam Questions
3 mins3 questions
21 mark
Which of the following processes in the nitrogen cycle directly converts atmospheric nitrogen (N2) into a form usable by plants?
Nitrification
Denitrification
Nitrogen fixation
Ammonification
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31 mark
Study the data below and answer the question:
Soil Type | Total Nitrogen Content (kg N/ha) | Nitrogen Fixation Rate (kg N/ha/yr) | Denitrification Rate (kg N/ha/yr) | Net Nitrogen Gain (kg N/ha/yr) |
Tropical Rainforest | 1,200 | 40 | 10 | 30 |
Agricultural Soil | 1,500 | 5 | 35 | -30 |
Wetland | 900 | 15 | 25 | 5 |
Boreal Forest | 1,000 | 20 | 5 | 10 |
Which soil type has the greatest net nitrogen loss?
Tropical Rainforest
Agricultural Soil
Wetland
Boreal Forest
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