Irrigation Engineering - Study Mode
[#191] Disposal of extra excavated earth of canals, is utilized to provide a spoil bank on
Correct Answer
(D) All the above
[#192] The duty is largest
Correct Answer
(B) on the field
[#193] A 70% index of wetness means
Correct Answer
(B) rain deficiency of 30%
[#194] Useful soil moisture for plant growth, is
Correct Answer
(A) Capillary water
[#195] The state of the soil when plants fail to extract sufficient water for their requirements, is
Correct Answer
(B) Permanent wilting point
Explanation
Solution: The correct answer is Permanent wilting point . In irrigation engineering , the term Permanent wilting point refers to the state of the soil when plants are unable to extract sufficient water for their needs. At this point, the soil moisture content is so low that plants wilt permanently, even if moisture is added to the soil. So, the sentence should read: "The state of the soil when plants fail to extract sufficient water for their requirements, is Permanent wilting point ."