E-PolyLearning

1. What type of system does the diagram represent?
a. Drains
b. French Drain
c. Deep Surface Drain System
d. Random Field Drain System
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Answer: (d).Random Field Drain System

2. A land is said to be water-logged when _______________
a. the aeration is stopped in the root zone due to the rise in water content
b. there is a reduction in crop yield
c. there is an accumulation of alkali salts in the root zone of the crop
d. there is salinity in the soil
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Answer: (a).the aeration is stopped in the root zone due to the rise in water content

3. What is the pH range for strongly alkaline soils?
a. 7.4 – 7.8
b. 7.9 – 8.4
c. 8.5 – 9.0
d. > 9
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Answer: (c).8.5 – 9.0

4. Presence of excessive moisture retards the bacterial activities affecting crop growth.
a. True
b. False
c. May be True or False
d. Can't say
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Answer: (a).True

5. Which of the following statement is wrong?
a. Seepage drains reduce the chances of water-logging
b. Untimely maturity of the crops is the characteristic of water-logged lands
c. The percolation loss can be reduced by keeping the intensity of irrigation low
d. There is no way to keep a watch over the problem of water-logging
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Answer: (d).There is no way to keep a watch over the problem of water-logging

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