Soil Science Archives | Page 8 of 50

Organic matter decomposes rapidly in Pakistani soils because of ____________ conditions, that is why our soils generally have < 1% organic matter:

July 20, 2021March 25, 2021 by admin

Organic matter decomposes rapidly in Pakistani soils because of ____________ conditions, that is why our soils generally have < 1% organic matter:

A. High temperature
B. Alkaline
C. Both a & b
D. None of a & b

The capacity of a soil to function on sustained basis promoting plant & animal health:

July 20, 2021March 25, 2021 by admin

The capacity of a soil to function on sustained basis promoting plant & animal health:

A. Soil neutrality
B. Soil quality
C. Both a & b
D. None of these

The available soil is being polluted quickly by _____________ wastes.

July 20, 2021March 25, 2021 by admin

The available soil is being polluted quickly by _____________ wastes.

A. Industrial
B. Agricultural
C. Household
D. All of the above

___________ , considered a perfect soil, is a mixture of silt, clay and sand:

July 20, 2021March 25, 2021 by admin

___________ , considered a perfect soil, is a mixture of silt, clay and sand:

A. Clay
B. Sandy loam
C. Loamy sand
D. Loam

The unit of a scale used to measure the level of acidity or alkalinity of chemicals is called:

July 20, 2021March 25, 2021 by admin

The unit of a scale used to measure the level of acidity or alkalinity of chemicals is called:

A. Ec
B. pH
C. Pascal
D. None of the above

The following types of check dams have been tried in Pakistan:

July 20, 2021March 25, 2021 by admin

The following types of check dams have been tried in Pakistan:

A. Brushwood check dams
B. Loose stone or wire-bound check dams
C. Cement & stone check dams
D. All of the above

Any tillage and planting system that maintains at least 30% of the soil surface covered by residue after planting for the purpose of reducing soil erosion by water:

July 20, 2021March 25, 2021 by admin

Any tillage and planting system that maintains at least 30% of the soil surface covered by residue after planting for the purpose of reducing soil erosion by water:

A. Deep Tillage
B. Conservation Tillage
C. Both a & b
D. None of these

Surface removal of ice or snow from a glacier or snowfield by melting, sublimation, and/ or calving:

July 20, 2021March 25, 2021 by admin

Surface removal of ice or snow from a glacier or snowfield by melting, sublimation, and/ or calving:

A. Abrasion
B. Ablation
C. Backplain
D. Bank-Caving

Inorganic constituents vary in size from fine clay particles _ mm to large _ mm gravel and rock:

July 20, 2021March 25, 2021 by admin

Inorganic constituents vary in size from fine clay particles _________ mm to large _________ mm gravel and rock:

A. < 0.002 mm- >2 mm
B. 0.5 mm – 1.0 mm
C. 0.02 mm- 0.2 mm
D. None of the above

Organic Soils are classified as and are also known as soils:

July 20, 2021March 25, 2021 by admin

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