Forestry

The best windbreaks approach is 100% crown density in the low-profile shurb, rows, and _____ density in the tall rows:

A. 50%
B. 60%
C. 70%
D. 80%

How windbreaks functions is:

A. The air is baffled and mixed as it hits the wind breaks
B. Causing a disruptive turbulence patterns which spoils the energy and velocity of the wind
C. This mixing and churning continues as the pressure gradient is built by the windbreak and the air leaks through or rolls over the top of the screen
D. All of the above

The kind of windbreak is:

A. Trees and shrubs best suited or preferred by the farmer how much space is available
B. And whether the land is irrigated or rain fed.
C. Both (a) & (b)
D. None of these

Windbreaks/shelterbelts cover:

A. Trees and / or shrubs can substantially improve the productivity of farmlands
B. They are exposed to strong winds
C. Both (a) & (b)
D. None of these

Different ecological areas have different techniques for afforestation. These techniques are____________?

A. Afforestation of dry tracts with irrigation
B. Afforestation of canal banks
C. Reclamation of dry sites without irrigation
D. Reclamation of denuded hill slopes
E. All of the above

Reclamation of denuded hill slopes are _____________?

A. General considerations
B. Site conditions
C. Choice of species
D. Soil preparation
E. All of the above

Protection and site maintenance are :______________?

A. Protective mensures against grazing
B. Fire protection and controlled burning
C. Protection against forest
D. All of the above

The effects of mulches, irrespective their composition, are attributed to:________?

A. Suppression of weeds, by restricting the amount of light on the ground surface and the hindering their germination and growth
B. Conservation of soil, by preventing erosion
C. Thermal insolation, leading to greater deposition of dew
D. All of the above

The major types of mulching are:_________?

A. Artificial mulches
B. Natural inorganic mulches
C. Stone mulch
D. Organic mulches
E. All of the above

Cultural practice is / are :___________?

A. Cultivations

B. Weeding

C. Cover Crops

D. All of the above