Question:
In agroforestry point of view, which one is not having negative effect at the tree-crop interface?
In agroforestry point of view, which one is not having negative effect at the tree-crop interface?
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Allelopathic or mechanical weed suppression is a positive service of agroforestry trees.
It reduces farm management costs, unlike light, water, and nutrient competition.
It reduces farm management costs, unlike light, water, and nutrient competition.
Updated On: Jul 10, 2026
- Light competition
- Nutrient competition
- Weed suppression
- Water competition
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
The tree-crop interface in agroforestry involves complex ecological interactions that can be competitive (negative), complementary (positive), or neutral.
Step 2: Detailed Explanation:
Let us analyze the nature of the listed interactions:
1. Light competition (Negative): Trees block solar radiation, reducing photosynthesis and growth of underlying crops.
2. Nutrient competition (Negative): Tree roots and crop roots compete in the same soil zones for nitrogen, phosphorus, and potassium.
3. Water competition (Negative): Trees and crops compete for soil moisture, which can limit crop yield, particularly in arid regions.
4. Weed suppression (Positive/Complementary): The dense canopy of trees and the leaf litter mulch they produce suppress weed seed germination and growth.
This reduces weeding labor and resource competition from weeds, which is a beneficial, positive effect of trees on the farming system.
Step 3: Final Answer:
Weed suppression is a positive, beneficial interaction, and thus does not have a negative effect at the tree-crop interface.
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