Topic 9A) Nitrogen

Question 1

Roles of Nitrogen in Plants

Answer 1

Plant Roles(growth and development)

Question 2

Nitrogen Deficency

Answer 2

Lower Protien Higher suger
Mobile within in plants

Question 3

Nitrogen Oversupply

Answer 3

Excess growth (Lack of structure)
Water pollution

Question 4

Forms of Plant Available Nitrogen

Answer 4

Nitrate (NO3-) and Ammoonium (NH4+)

Question 5

Nitrogen Pools

Answer 5

Atmosphere (78%) of nitrogen but is exetremly stable created by fixation

Soils (0.02/0.5%)

Question 6

Organic vs Inorganic Nitrogen

Answer 6

95-99% of soil nitrogen is unavavilble to plants

Question 7

Nitrogen Fixation

Answer 7

Carriod out in the soil by a limited number of bacteria. This makes triple bonded nitrogen in in NH3 for plant use

Question 8

Haber-Bosch Process

Answer 8

this process allow humans process triple bonded N2 into plant usable nitrate (NH3)

Question 9

Mineralization

Answer 9

Large organic molecules broken into consistuent parts.
Organic N –> inorganic
Enzymebs both inside mircobes and those excreated into the soil solution.

Question 10

Immobilization

Answer 10

Conversion of inorganic nitrogen to organic forms.

Depends on ratio of

Question 11

Ammonifaction

Answer 11

breaks down organic compounds into ammonium.

1) Volatilization
(loss of N from ecosystem)

2) Nitrification
(Oxidation process takes place in 2 steps)

Nitrosomonas and Nitrobactor

Question 12

Denitrification

Answer 12

Nitrogen Loss to the atmosphere
Nitrate (NO3) ions converted to gaseous forms of nitrogen due to lack of oxygen

Question 13

Pyro-denitirifcation

Answer 13

Loss of nitrogen due to fire

Question 14

Nitrogen Leaching

Answer 14

Riparian zones help to absorb mos the the nitroegen leaching so it doesnt run off into the streams and bodies of water