A. 5 meters
B. 10 meters
C. 20 meters
D. 30 meters
Related Mcqs:
- With the construction of Thal irrigation canal, about _____ sand dunes have been converted into highly productive cultivated areas:
A. 1 m ha
B. 2 m ha
C. 3 m ha
D. 4 m ha - Sand dunes adversely affect:
A. Communication system
B. Human health
C. Cultivation
D. Animal health
E. All of the above - Where sand dunes normally occur?
A. Sand accumulates
B. Sand deposited
C. Both (a) & (b)
D. None of these - The reservoir of Mangla is being silted at the rate of 48.27 million m3 per year and that of Tarbela at the rate of _____ million cubic meters per year:
A. 160.5
B. 167.75
C. 170.6
D. 175.8 - Tarbela dam is being silted at ______ acre feet per year while Mangla is being silted at a rate of _____ acre feet per year due to misuse of their watershed area:
A. 109000, 42,000
B. 110000, 43000
C. 115000, 44,000
D. None of these - For instance consumptive use of water by tamrix is 22 to 28,000 m3/ha/annum while that of willows and poplars is 7,700 to 13,500 and _____
A. 6,500 to 23,00 m3
B. 5,500 to 20,500 m3
C. 4,500 to 18,500 m3
D. None of these - Winds – Hot and desiccating winds blow from _____ at the rate of 80-96 km per hour and decrease the efficiency of the already meager rainfall in the plains areas:
A. April to September
B. June to October
C. July to November
D. None of these - A country where _____ per cent of the total aea consists of moutains, gullied foot hills, arid waste and deserts, can never achieve the desired progress unless major part of this usable waste is harnessed to the advantage of its people:
A. 50 to 55
B. 55 to 60
C. 65 to 70
D. None of these - The plants present on the sand and gravel:
A. Lithophytes
B. Oxalophytes
C. Phancrophytes
D. Psammophytes - Plants growing on sand and gravel are called:
A. Eremophytes
B. Oxylophytes
C. Psilophytes
D. Psammophytes
The correct answer to the question: "Longitudinal sand dunes move slowly at the rate of _____ per annum:" is "10 meters".
