The injuries are generally caused by:

Related Mcqs:

1. 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...

2. 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....

3. 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...

4. Frost injuries are:

   A. Heavy frost B. Heavy low temperature C. Both (a) & (b) D. None of these...

5. The air pollution caused by phosphate fertilizer factories is due to:The air pollution caused by phosphate fertilizer factories is due to:

   A. Phosphene B. SiF4 C. Dust D. Halogens...

6. The extent of darkness caused due to smoke can be determined by the help of:

   A. Smoke filters B. Ringelmann’s charts C. Horizontal microscopes D. All of these...

7. Atmospheric pollution is also caused by the gas:

   A. Phosphene B. Nitrogen C. Hydrogen D. Nerve gas VX...

8. Air pollution is caused by:

   A. Automobile exhausts B. Radioactive substances C. Smoke D. All of the above...

9. Acid rain is mainly caused by increased concentration (in atmosphere) of:

   A. Ozone and dust B. NH3 and SO3 C. CO and SO3 D. NO2 and SO2...

10. Sheet erosion is caused by:

    A. Fast running rivers B. Wind C. Heavy rains D. Glaciers...