The Nitrogen Cycle

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Across
  1. 1. an electrical discharge caused by imbalances
  2. 4. a type of plant such as a pea or bean
  3. 5. any material that is applied to soil or to plant tissues to supply one or more plant nutrients essential to the growth of plants
  4. 10. an intermediate product of the oxidation of ammonia to nitrate
  5. 11. the biological oxidation of ammonia to nitrite
Down
  1. 2. a compound that is formed naturally when nitrogen combines with oxygen or ozone
  2. 3. the state or process of rotting
  3. 5. process of converting atmospheric nitrogen to another form of nitrogen
  4. 6. a type of biological cell
  5. 7. a colorless gas composed of hydrogen and nitrogen
  6. 8. a macronutrient that is essential to building muscle mass
  7. 9. the part of a vascular plant that is normally underground