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
Soil Science
World biodiversity day is celebrated on:………?
A. Mar-21
B. March-2
C. Apr-22
D. May-22
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
The lands which are rich in soluble salts and exchangeable sodium:
A. Saline soil
B. Saline-Alkaline
C. Alkaline
D. None of the above
The most suitable species for reclamation of sandy soils is:………?
A. Casuarina equiselifolia
B. Acacia spp
C. Azadirachta indica
D. All of the above
Erosion permitting and erosion resisting crops grow alternatively at right angle to the slope of the land is called as:………?
A. Linear planting
B. Strip planting
C. Cover planting
D. All of the above
The suitable species for reclamation of saline & sodic soil is:……….?
A. Casuarina equisetifolia
B. Albizia lebbeck
C. Both A & B
D. None of the above
Organic Soils are classified as ………… and are also known as ………… soils:
A. Alfisols. fine & coarse textured
B. Histosols, peat & muck
C. Ultisols, Fe & Al rich
D. None of the above