A. Heavy frost
B. Heavy low temperature
C. Both (a) & (b)
D. None of these
Related Mcqs:
- What are kinds of frost injuries?
A. Frost rings: are dark brownish lines within the growth rings as a result of injury to the cambium due to the heavy frost
B. Frost cracks: to the very much low temperature, the cracks appear at the basal portion of old trees
C. Both (a) & (b)
D. None of these - Injuries by diseases is / are:
A. Throughout their life
B. Seeds decay and seedlings are killed by damping-off
C. Generally serious in the coniferous nurseries
D. All of the above - Injuries by insects is / are:
A. An essential part of the forest ecosystem
B. Some are beneficial; quite a few are serious pests of trees and wood products
C. Tonica inviferana, a semal shoot borer, Ascotis imparata,
D. A bakain defoliator and Margaronia phloalis a defoliator of mulberry are serious pests of other tree species grown in forest plantations
E. All of the above - The injuries are generally caused by:
A. Unnecessary haste
B. Use of improper tools
C. Pruning during the growing season when the bark is loose
D. All of the above - Plants are killed in winter by frost:
A. Because there is no transpiration
B. Because respiration ceases at such a low temperature
C. Because no photosynthesis takes place at such a low temperature
D. Because of desiccation and mechanical damage to the tissues - Kau (Ole ferruginea) utilization of timber:
A. Fuel wood
B. Charcoal of high calorific value agricultural implements
C. Both (a) & (b)
D. None of these - Simal (Salmalia malabarica) utilization of timber:
A. Match industry, plywood, crates
B. Package boxed, useful material from seeds for pillows and quilts
C. Both (a) & (b)
D. None of these - Poplar (Populus deltoidies) utilization of timber:
A. Packing cases and crates, match splint and boxes, veneer
B. Plywood, rural house construction and pulp and paper
C. Both (a) & (b)
D. None of these - Fir (Abies pindrow) utilization of timber:
A. Packing cases, railway sleepers
B. Planking for floors
C. Ceiling, cheap type of doors and windows
D. House construction, plywood, match manufacture
E. All of the above - What is the causes of abnormal wood (CW/TW)?
A. To Evarts and Mason (106) it is due to gravity
B. Metzger (1908) says it is due to tension and compression
C. Wersking and Baily, due to (1942) increase or decrease in plant hormones
D. Philips says (1940), it is due to wind
E. All of the above
The correct answer to the question: "Frost injuries are:" is "Both (a) & (b) ".