Diseased trees (k), including specimens heavily infested with parasites to the detriment of their growth or posing a threat to neighboring flora:
Show answer Hide answer
Answer: C. Both (a) & (b)
Explanation
Diseased and heavily infested trees are marked for removal alongside dominated and suppressed specimens during thinning operations. Silvicultural marking rules dictate that unhealthy or parasite-ridden trees must be cleared to protect the surrounding forest stand. Both categories represent structurally inferior or vulnerable trees that detract from overall forest health and vigor. Forest hygiene fellings target diseased individuals to prevent the spread of fungal pathogens and destructive insect pests. Dominated and suppressed trees receive insufficient sunlight and nutrients, making them more susceptible to disease and mortality. Canopy management requires systematic evaluation of individual tree vitality to maintain a productive and healthy woodland ecosystem.
Option A refers to dominant trees that receive full overhead sunlight and form the upper forest canopy layer. Option B covers suppressed and dominated specimens but omits the crucial classification of actively diseased or infested trees. Option D is incorrect because the correct classification encompasses both dominated groups and diseased specimens together.
- Subject
- Agriculture
- Category
- Forestry
- Topic
- —
- Difficulty
- medium
Related questions
Q1. The concepts and definitions central to agro-forestry entail:
Show answer Hide answer
Answer: C. Both (a) & (b)
Agroforestry is scientifically defined as a sustainable land-use system integrating trees with agricultural crops. The practice must be both ecologically and socially acceptable while successfully increasing the overall...
Q2. Damage resulting from fire outbreaks involves:
Show answer Hide answer
Answer: E. All of the above
Wildfires inflict severe physiological damage on mature trees through scorching and burning. Young regeneration seedlings and delicate forest soils are completely destroyed by intense flames. Native wildlife populations...
Q3. Dioscorea holds major significance regarding the following characteristic:
Show answer Hide answer
Answer: C. Drug
Dioscorea species accumulate high concentrations of steroidal saponins, particularly diosgenin, within their underground tubers. These complex chemical compounds serve as the primary foundational raw material for synthes...
Q4. Limitations associated with agroforestry practices include:
Show answer Hide answer
Answer: C. Both (a) & (b)
Agroforestry adoption encounters multiple socioeconomic and technical hurdles that restrict its widespread implementation. These inherent limitations hinder both theoretical acceptance of the concepts and their practical...
Q5. Products derived through distillation and extraction comprise:
Show answer Hide answer
Answer: C. Both (a) & (b)
Extraction and distillation processes yield valuable commercial oils from various tree species. Eucalyptus leaves and aromatic grasses produce essential oils through steam distillation methods. Both accurate examples con...
Q6. Various species of wildlife are cataloged within the:
Show answer Hide answer
Answer: E. All of the above
Historical and sacred texts frequently document local wildlife species, reflecting the cultural perceptions of ancient human societies. Passages across various biblical books mention specific animals, birds, and ecologic...