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Topic 9A) Nitrogen Flashcards

(14 cards)

1
Q

Roles of Nitrogen in Plants

A

Plant Roles(growth and development)

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2
Q

Nitrogen Deficency

A

Lower Protien Higher suger
Mobile within in plants

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3
Q

Nitrogen Oversupply

A

Excess growth (Lack of structure)
Water pollution

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4
Q

Forms of Plant Available Nitrogen

A

Nitrate (NO3-) and Ammoonium (NH4+)

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5
Q

Nitrogen Pools

A

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

Soils (0.02/0.5%)

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6
Q

Organic vs Inorganic Nitrogen

A

95-99% of soil nitrogen is unavavilble to plants

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7
Q

Nitrogen Fixation

A

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

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8
Q

Haber-Bosch Process

A

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

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9
Q

Mineralization

A

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

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10
Q

Immobilization

A

Conversion of inorganic nitrogen to organic forms.

Depends on ratio of

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11
Q

Ammonifaction

A

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

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12
Q

Denitrification

A

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

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13
Q

Pyro-denitirifcation

A

Loss of nitrogen due to fire

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14
Q

Nitrogen Leaching

A

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

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