Windbreaks – Shelter belts

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

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

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

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

A. 1H
B. 2H
C. 3H
D. 4H

A. 15%
B. 20%
C. 25%
D. 30%

A. Are carefully measured at various points on a line perpendicular to the center of the windbreak
B. By calculation, it can be shown that the total potential yields for most crops will be 2-10% greater on the field
C. Both (a) & (b)
D. None of these

A. Grazing protection
B. Fire protection
C. Pruning
D. Harvesting
E. All of the above