Tunnel erosion is the form of:__________?

A. Rainsplash erosion
B. Sheet erosion
C. Rill erosion
D. Gully erosion

According to the Soil survey of Pakistan, the total waterlogged summer-rain area in the country is:_________?

A. 4.11 mha
B. 5.16 mha
C. 22.5 mha
D. The above statement is wrong

Sustainable Technologies to Control Water-Logging:

A. Installation of tube-wells for irrigation and vertical drainage.
B. Planning and designing of future canals on proper lines.
C. Planting of eucalyptus in water-logged areas.
D. All of these

In Pakistan, approximately __________ mha of irrigated land is affected by salinization:

A. 12.6 mha
B. 5.7 mha
C. 8.2 mha
D. None of the above

Sustainable technologies to improve soil fertility and physical condition:

A. Balance use of npk fertilizers according to the need of crops.
B. Following proper crop rotation (shallow rooted and deep root crops) in the cropping session.
C. Regular use of fym, composts, acidic mulches, green manures and organic fertilizers to increase om content of soil.
D. All of the above

Soil erosion Occurs mainly in:_________?

A. Inceptisols, mollisols
B. Alfisols, entisols
C. Both a & b
D. None of the above

Water-erosion can be reduced / controlled by:___________?

A. Provision of surface-cover that intercepts the rain before hitting the soil.
B. Reducing the amount of runoff by promoting infiltration.
C. Both a & b
D. None of the above

Pakistan being predominantly an arid and semiarid country, In addition to agricultural productivity losses and increasing poverty, desertification results in significant reductions in _________?

A. Contributing to global warming
B. Carbon storage in soils
C. Loss of biodiversity
D. All of these

In low-rainfall areas, huge shifting sand dunes are commonly found, particularly near human habitations. Techniques of afforesting the shifting dunes needed to be implemented. These techniques consist of___________?

A. Treatment of shifting sand-dunes by fixing barriers in parallel stripes or in a chess-board design, using the local shrub material starting from the crest of the dunes to protect the seedlings from burial or exposure by the blowing of sand.
B. Protection against biotic interference
C. Both a & b
D. None of these

The practice of managing rows of closely planted woody plants with annual crops planted in alleys in between hedges is called as:________?

A. Soil conservation hedges
B. Woody hedgerows
C. Hedgerows intercropping
D. All of these