Which thinning removes the trees with the dominant crowns?

Which thinning removes the trees with the dominant crowns?

• A. Crown thinning
• B. Low thinning
• C. Mechanical/row thinning
• D. Selection thinning

Answer: (D)

The key idea is targeting competitive pressure in the stand. In a selection thinning, you remove individual trees that exert the most dominance and suppression on neighboring trees. Trees with dominant crowns capture a lot of light and push other trees to the shade side, limiting their growth. By selectively removing those dominant-crowned trees, the remaining trees gain more light, water, and nutrients, allowing faster diameter and height growth and improving overall stand quality over time. This approach focuses on selectively lifting the growth of the best or most competitive trees by removing the ones that most strongly dominate the canopy. For context, other thinning types focus on different objectives: removing suppressed or intermediate trees to release crop trees (low thinning), removing trees with heavy crown competition across the canopy (crown thinning), or thinning along rows in a mechanized, orderly way (mechanical/row thinning).

The key idea is targeting competitive pressure in the stand. In a selection thinning, you remove individual trees that exert the most dominance and suppression on neighboring trees. Trees with dominant crowns capture a lot of light and push other trees to the shade side, limiting their growth. By selectively removing those dominant-crowned trees, the remaining trees gain more light, water, and nutrients, allowing faster diameter and height growth and improving overall stand quality over time. This approach focuses on selectively lifting the growth of the best or most competitive trees by removing the ones that most strongly dominate the canopy.

For context, other thinning types focus on different objectives: removing suppressed or intermediate trees to release crop trees (low thinning), removing trees with heavy crown competition across the canopy (crown thinning), or thinning along rows in a mechanized, orderly way (mechanical/row thinning).