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Tree N Stuff > Nitrogen Cycle > Flashcards

Nitrogen Cycle Flashcards

1
Q

Nitrifying bacteria

A

Oxidise ammonium compounds to nitrates

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2
Q

N2 fixing bacteria

A

Synthesising organic nitrogen containing compounds ( amino acids )

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3
Q

Denitrification

A

Returning N2 to the atmospheric pool

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4
Q

Factors that affect nitrogen cycle

A

🌿amount of organic matter available for decay
🌿increase of oxygen in soil for nitrifying bacteria
🌿availability of nitrifying bacteria
🌿part played by detritotores eg earthworms help to aerate the soil

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5
Q

Maximum nitration

A

🌿soil well drained - aerobic for nitrifying bacteria
🌿lots of organic material available for decay
🌿plough crop back into soil rather than harvest keep in the soil
🌿well aerated

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6
Q

Processes of nitration

A

Decay/ decomposition and ammonification
Nitrification
Active uptake
(Denitrification)

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7
Q

Bacteria for nitrifying

A

Nitrosomanus ammonium to nitrites

Nitrobacter nitrites to nitrates

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8
Q

Bacteria for denitrifying

A

Pseudomanus ( nitrates to n2 gas)

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9
Q

Bacteria for nitrogen fixation

A

Rhizobium

Found in soil and root nodules of legumes eg peas

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Tree N Stuff (4 decks)

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