Question:
Which among the following phenomena directly affects crop growth and yield?
Which among the following phenomena directly affects crop growth and yield?
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Weed-crop interactions:
- Allelopathy: Chemical inhibition.
- Competition: For water, nutrients, light.
- Allelopathy can reduce crop yield significantly.
- Allelopathy: Chemical inhibition.
- Competition: For water, nutrients, light.
- Allelopathy can reduce crop yield significantly.
Updated On: Aug 27, 2026
- Competition for nitrogen
- Competition for water
- Competition for carbon dioxide
- Allelopathy
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of weed-crop interactions.
Step 2: Detailed Explanation:
Allelopathy is the phenomenon where plants release chemicals that inhibit the growth of other plants.
It directly affects crop growth and yield.
Competition for nitrogen (A), water (B), and CO2 (C) are also important, but allelopathy is a specific phenomenon.
However, the question asks for a phenomenon that directly affects crop growth and yield.
All options are factors, but allelopathy is a specific chemical interaction.
I'll go with allelopathy.
Step 3: Final Answer:
Thus, allelopathy directly affects crop growth and yield, which corresponds to option (D).
[0.5cm]
This question tests knowledge of weed-crop interactions.
Step 2: Detailed Explanation:
Allelopathy is the phenomenon where plants release chemicals that inhibit the growth of other plants.
It directly affects crop growth and yield.
Competition for nitrogen (A), water (B), and CO2 (C) are also important, but allelopathy is a specific phenomenon.
However, the question asks for a phenomenon that directly affects crop growth and yield.
All options are factors, but allelopathy is a specific chemical interaction.
I'll go with allelopathy.
Step 3: Final Answer:
Thus, allelopathy directly affects crop growth and yield, which corresponds to option (D).
[0.5cm]
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