Engineering :: Irrigation Engineering
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11. |
Irrigation is supplementary to rainfall. |
Answer: Option A
Explanation:
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12. |
Irrigation |
A. |
increases |
B. |
decreases |
Answer: Option A
Explanation:
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13. |
Irrigation is said to be a science of survival. |
Answer: Option A
Explanation:
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14. |
A useful soil moisture for plant growth is |
A. |
capillary water |
B. |
gravitational water |
C. |
hygroscopic water |
D. |
all of these |
Answer: Option A
Explanation:
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15. |
The amount of water required to fill up the pore spaces in soil particles by replacing all air held in pore spaces, is known as |
A. |
field capacity |
B. |
saturation capacity |
C. |
available moisture |
D. |
all of these |
Answer: Option B
Explanation:
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16. |
The moisture content of the soil, after free drainage has removed most of the gravity water, is known as |
A. |
field capacity |
B. |
saturation capacity |
C. |
wilting co-efficient |
D. |
available moisture |
Answer: Option A
Explanation:
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17. |
The water content at which plants can no-longer extract sufficient water from the soil for its growth, is called |
A. |
field capacity |
B. |
saturation capacity |
C. |
permanent wilting point |
D. |
available moisture |
Answer: Option C
Explanation:
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18. |
Available moisture may be defined as the |
A. |
moisture content at permanent wilting point |
B. |
difference in water content of the soil between field capacity and permanent wilting |
C. |
maximum moisture holding capacity |
D. |
all of these |
Answer: Option B
Explanation:
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19. |
The field capacity of a soil depends upon |
A. |
capillary tension in soil |
B. |
porosity of soil |
C. |
either (a) or (b) |
D. |
both (a) and (b) |
Answer: Option D
Explanation:
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20. |
Capillary water is a useful soil moisture for the growth of plants. |
Answer: Option A
Explanation:
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