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Question

The limiting factor in nitrification of soil is

A
pH
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B
Temperature
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C
Light
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D
Air
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Solution

The correct option is A pH
Nitrification is an integral part of nitrogen fixation where the ammonia is oxidized to nitrite and nitrate, by the action of nitrifying bacteria. The soil pH is a known limiting factor of nitrification. Nitrifiers prefer a range of pH from 7 to 9. Nitrobacter can be slowed if there are toxic levels of NH3 and a pH greater than 7.5.

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