Question:
In soil plaque method of soil fertility assessment developed by Winogradsky, which microorganism is studied?
In soil plaque method of soil fertility assessment developed by Winogradsky, which microorganism is studied?
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Soil plaque method:
- Developed by Winogradsky.
- Uses Azotobacter as indicator.
- Assesses soil fertility.
- Developed by Winogradsky.
- Uses Azotobacter as indicator.
- Assesses soil fertility.
Updated On: Aug 27, 2026
- Azotobacter
- Aspergillus
- Both Azotobacter and Aspergillus
- Pseudomonas
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of soil fertility assessment methods.
Step 2: Detailed Explanation:
The soil plaque method developed by Winogradsky uses Azotobacter as an indicator organism.
Azotobacter is a free-living nitrogen-fixing bacterium.
The growth and activity of Azotobacter indicate soil fertility.
Aspergillus (B): Not used in this method.
Pseudomonas (D): Not used.
Thus, the correct answer is Azotobacter.
Step 3: Final Answer:
Thus, Azotobacter is studied in the soil plaque method, which corresponds to option (A).
[0.5cm]
This question tests knowledge of soil fertility assessment methods.
Step 2: Detailed Explanation:
The soil plaque method developed by Winogradsky uses Azotobacter as an indicator organism.
Azotobacter is a free-living nitrogen-fixing bacterium.
The growth and activity of Azotobacter indicate soil fertility.
Aspergillus (B): Not used in this method.
Pseudomonas (D): Not used.
Thus, the correct answer is Azotobacter.
Step 3: Final Answer:
Thus, Azotobacter is studied in the soil plaque method, which corresponds to option (A).
[0.5cm]
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