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13 Cards in this Set

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Nitrogen cycle
process by which atmospheric nitrogen is converted into compounds for use by plants and animals eventually returned by decay
Nitrogen fixation
process of using nitrogen from the atmosphere to make nitrates from the soil
organism that have nitrogen fixing bacteria
bean peas clover alder trees
how nitrogen can be fixed by something nonliving
bacteria along with fungi that are essential to the nitrogen cycle
atmospheric nitrogen
Nz=Gas
Decomposer roles in nitrogen cycle
return to the nitrogen to the soil
example of decomposers
bacteria and fungi
form of nitrogen bacteria inthe soil use
NH3
From of nitrogen bacteria in the soil make
nitrates
Form of nitrogen used by plants
nitrates
From of nitrogen used by nitrogen fixing bacteria
atmosphere Nz
Form of made by nitrogen fixing bacteria
ammonia
How much nitrogen is in the atmosphere
78%