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Question
The major reservoir for phosphorus is
Options:
A .  cloud
B .  soil and rocks
C .  atmosphere
D .  plants
Answer: Option B
:
B
Phosphorus reservoirs are found basically in soil and sedimentary rocks, because unlike the other nutrients that cycle through the biosphere, phosphorus cannot be found in air in the gaseous state. This is because phosphorus is usually solid at normal temperatures and pressures, it is highly reactive and combines with other elements to form acids and salts. Therefore it mainly cycles through water, soil and sediments.

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