Question

In which form most plants absorb nitrogen from the soil?

Answer 1

Answer:

Plants absorb nitrogen from the soil in the form of nitrate (NO3−) and ammonium (NH4+). In aerobic soils where nitrification can occur, nitrate is usually the predominant form of available nitrogen that is absorbed.

Answer 2

The majority of plants take nitrogen as nitrates, nitrites, and urea.

About Nitrogen fixation:

• Molecular nitrogen in the air, which has a strong triple covalent bond, is changed into ammonia or other similar nitrogenous compounds by the chemical process known as nitrogen fixation, which normally occurs in soil or aquatic systems but can also occur in the industry.
• The process by which nitrogen is removed from the atmosphere's molecular form ($N_{2}$) and transformed into nitrogen compounds helpful for other biological processes is known as nitrogen-fixing.
• Fixation may be brought on by industrial, biological, or atmospheric (lightning) activities.
• The atmosphere, Haber Process, and biological processes can all fix nitrogen.
• When lightning strikes, its high temperature divides nitrogen gas, causing it to interact with oxygen and moisture in the air to produce nitrates, which then fall to the ground as rain.

Nitrogen fixation in plants:

• Through a biological process called nitrogen fixation, the nitrogen gas is transformed into a form that is useful to plants and other bacteria.
• In this process, atmospheric nitrogen gas is transformed into ammonia and other nitrogenous molecules that are related.
• The bacteria that fix nitrogen are known as diazotrophs, and they produce nitrogenase, an enzyme complex that catalyzes the conversion of nitrogen dioxide ($N_{2}$) gas to ammonia.

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