Pick up the correct statement from the following:
A. Gravity water is harmful to crops
B. Hygroscopic water remains attached to soil molecules by chemical bond
C. Capillary moisture held in the soil pores against gravity by surface tension, is utilized by plants
D. All the above
Answer: Option C
Solution (By Examveda Team)
Gravity water is harmful to crops because it moves quickly through the soil, often beyond the root zone, and does not provide effective moisture to the plants.Hygroscopic water remains attached to soil molecules by a chemical bond, making it unavailable for plant absorption.
Capillary moisture, held in the soil pores against gravity by surface tension, is the form of water that plants utilize for their growth and survival.
This Question Belongs to Civil Engineering >> Irrigation Engineering
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Finally formed berms in canals are provided for
A. Protection of banks erosion by the waves
B. Control of seepage losses
C. Strengthening of banks
D. All the above
Canals constructed for draining off water from water logged areas, are known
A. Drains
B. Inundation canals
C. Valley canals
D. Contour canals
A hydroelectric scheme operating under a head of 80 m will be classified as
A. low head scheme
B. medium head scheme
C. high head scheme
D. none of the above
A. Low sodium water
B. Medium sodium water
C. High sodium water
D. Very high sodium water
All options are correct
Correct answer is D