Free Silviculture MCQs with Answers
312 Silviculture MCQs from Forestry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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312 questions · page 5 of 16
- A. Which reach only about half to 5/8th of the height of the best trees with their leading shoots definitely overtopped by their neighbours
- B. Al least shaded on all sides by the cm
- C. A small tree of height typical of suppressed trees standing with its leader free in a chance gap should not be classed as D or D
- D. All of the above
Explanation: Suppressed trees are much shorter, commonly about one-half to five-eighths the height of the best trees, and are overtopped and heavily…
Correct answer: All of the above- A. Both (a) & (b)
- B. Badly leaning trees usually of the whip type
- C. Bent over
- D. None of these
Explanation: Dead and moribund classes include trees that are bent over or badly leaning, particularly weak whip-like trees.
Correct answer: Both (a) & (b)- A. Dominant
- B. Dominated and suppressed
- C. Both (a) & (b)
- D. None of these
Explanation: Disease can affect trees in any crown class, including dominant, dominated, and suppressed trees, when infection seriously reduces growth…
Correct answer: Both (a) & (b)- A. Low thinning or ordinary thinning
- B. All of the above
- C. Selection thinning
- D. Mechanical thinning
- E. Crown thinnings or high thinning
Explanation: The recognised thinning methods include low or ordinary thinning, crown or high thinning, selection thinning, and mechanical thinning.
Correct answer: All of the above- A. Light Thinning (A-Grade)
- B. Moderate Thinning (B-Grade)
- C. Heavy Thinning (C-Grade)
- D. Very Heavy Thinning (D-Grade)
- E. All of the above
Explanation: Ordinary thinning is commonly graded by intensity as light (A), moderate (B), heavy (C), and very heavy (D).
Correct answer: All of the above- A. Trees are removed from the upper crown classes in order to open up the canopy
- B. Both (a) & (b)
- C. It favour the development of the most promising trees of the same classes
- D. None of these
Explanation: Crown or high thinning removes competing trees from the upper crown classes and releases the most promising trees in those classes.
Correct answer: Both (a) & (b)- A. In principle from the two methods already discussed
- B. The dominant trees are removed in order to stimulate the growth of the trees of the lower crown classes
- C. The same kind of vigorous trees those are favoured in crown
- D. All of the above
Explanation: Selection thinning combines principles of low and crown thinning, selecting trees for removal from different crown classes.
Correct answer: All of the above- A. All of the above
- B. They are less valuable than their neighbours
- C. They are of no special importance with regard to desirable species mixture
- D. They are restricting the development of their neighbours on all sides
Explanation: Selection thinning removes trees that restrict neighbours, are less valuable than them, or are unimportant for maintaining the desired…
Correct answer: All of the above- A. The trees to be cut or retained are chosen on the basis of a predetermined spacing
- B. Both (a) & (b)
- C. Or pattern with little or no regard for their position in the crown canopy
- D. None of these
Explanation: Mechanical thinning selects trees for removal or retention according to a predetermined spacing or pattern, largely ignoring their crown…
Correct answer: Both (a) & (b)- A. The attention is concentrated still further on the selection of the stems evenly spaced over the ground
- B. Which are to be retained to maturity or till the last thinning or two
- C. Both (a) & (b)
- D. None of these
Explanation: Free thinning gives special attention to selecting well-spaced stems that will be retained until maturity or the final one or two…
Correct answer: Both (a) & (b)- A. Agricultural growth
- B. Epiphytes
- C. Nematode disease
- D. Grasses
Explanation: Agrostology is the branch of botany concerned with grasses, including their identification, classification, and ecology.
Correct answer: Grasses- A. 30%
- B. 40%
- C. 50%
- D. 60%
Explanation: The American Bark Hack method improves resin flow by applying about 40% sulfuric acid to the tapping area.
Correct answer: 40%- A. Pathogens
- B. Insect hormone analogue
- C. Insect repellant
- D. Pheromones
Explanation: Insect hormone analogues disrupt moulting, development, or reproduction rather than killing pests through conventional toxicity, so they…
Correct answer: Insect hormone analogue- A. A flowery garden completes the beauty of a house
- B. It goes to satisfy aesthetic sense along with palate
- C. Both (a) & (b)
- D. None of these
Explanation: A flower garden enhances the beauty of a house and serves an aesthetic purpose; in the source wording, it is also associated with…
Correct answer: Both (a) & (b)- A. Always pick flowers in the early morning or in the evening
- B. Always carry cut flowers heads down to ensure their freshness for a longer period
- C. If you have freshly picked flowers and want them to be preserved for a longer period plunge them in a bucket or sink of water right upto their heads
- D. All of the above
- E. The flowers will remain fresh for a longer period of if you put their stems embedded inside a potato frustum
Explanation: Flowers last longer when picked during the cool parts of the day, carried carefully, and kept immediately supplied with water.
Correct answer: All of the above- A. Delonix regia, Bojer
- B. Millettia ovalifolia, Kurz
- C. Erytherina glabrescens, Parker
- D. Cassia fistula, Linn
- E. All of the above
Explanation: Delonix regia, Millettia ovalifolia, Erythrina glabrescens and Cassia fistula are ornamental flowering trees or shrubs commonly used in…
Correct answer: All of the above- A. The gold Mohr native of Madagascar is a large deciduous trees
- B. All of the above
- C. Flowers 4 inches across bright-scarlet
- D. Leaves bipinnate
Explanation: Delonix regia, commonly called gulmohar or flame tree, is a Madagascar-origin deciduous tree with bipinnate foliage and large…
Correct answer: All of the above- A. A small deciduous tree
- B. Flowers purple
- C. All of the above
- D. In recemes 2-3 inches long
Explanation: Millettia ovalifolia is a small deciduous ornamental tree bearing purple flowers in short racemes, generally about 2–3 inches long.
Correct answer: All of the above- A. A shrub or small tree
- B. Leaves 6-9 inches long
- C. None of these
- D. Both (a) & (b)
Explanation: Cassia glauca is usually a shrub or small tree, and its compound leaves are approximately 6–9 inches long.
Correct answer: Both (a) & (b)- A. A small evergreen tree
- B. All of the above
- C. Branches green
- D. Bark thin, smooth
Explanation: Parkinsonia aculeata is recognized by its small evergreen or semi-evergreen habit, thin smooth bark and green branches.
Correct answer: All of the above