Unit 5 Lesson 11 Plant and Soil Science

1
Unit 5Lesson 11Plant and Soil Science

• The Nitrogen Cycle

2
PSS.HO.1

• Nitrogen cycle
• Nitrogen fixation
• Nitrogen-fixing bacteria
• Ammonification
• Nitrification
• Denitrification

3
PSS.HO.2

• The pathway that nitrogen follows within an
  ecosystem
• The process by which gaseous nitrogen in the air
  is converted into ammonia
• Lives in the roots of legumes and convert
  atmospheric nitrogen into ammonia
• In the nitrogen cycle the formation of ammonia
  compounds
• The process in the nitrogen cycle by which
  nitrites and nitrates are produced
• A final step in the nitrogen cycle, during which
  nitrogen gas is returned to the atmosphere

4
PSS.PP.1