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Factors Affecting Atmospheric Nitrogen Fixation

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Factors Affecting Atmospheric Nitrogen Fixation

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Questions and Answers

What is the ideal pH range for rhizobia microbes?

6.5-9.5

4.5-7.5

3.5-6.5

5.5-8.5 (correct)

How do heat, ventilation, and humidity factors affect the plant growth process?

They decrease the efficiency of nitrogen fixation

They inhibit the synthesis of enzymes for nitrogen fixation

They have no impact on nitrogen fixation

They help in stabilizing the formation of root nodules (correct)

What is the role of molybdenum in the stabilization process?

It inhibits the synthesis of enzymes for nitrogen fixation

It has no role in nitrogen fixation

It helps in the formation of root nodules

It increases the efficiency of atmospheric N2 fixation (correct)

How does the C:N ratio inside the plant affect the efficiency of nitrogen fixation?

The higher the C:N ratio, the higher the efficiency of fixation Signup and view all the answers

What effect do some viruses have on rhizobia microbes?

They decompose the microbes, reducing their numbers and the number of root nodules formed Signup and view all the answers

Which of the following factors reduces the efficiency of nitrogen fixation?

The presence of mineral nitrogen in the soil Signup and view all the answers

How does the presence of ammonia and nitrates affect nitrogen fixation?

Reduces the amount supplied to the nitrogen-fixing microbe Signup and view all the answers

What effect does the presence of mineral nitrogen have on the number of nodes formed on the plant?

Leads to a decrease in the number of nodes formed Signup and view all the answers

What happens to the percentage of ammonia and nitrates in the plant sap as a result of their presence in the soil?

Increases significantly Signup and view all the answers

How does the consumption of carbohydrates in the plant affect nitrogen fixation?

Reduces efficiency in fixation Signup and view all the answers