11.
_________________ is an approach of production from salt affected lands by
growing salt tolerant plants
a) Saline agriculture
b)
Soil chemistry
c)
Soil physics
d)
Microbiology
12.
____________ is the measure of concentration of
salts in a soil or solution
a)
Sodicity
b)
Acidity
c)
Alkalinity
d) Salinity
13.
Sodic soils are the soils with excess salts of
a)
Sodium
b) Chloride
c) Calcium
d) Magnesium
14.
SAR stands for
a) Sodium adsorption ratio
b)
Sodium absorption ratio
c)
Silicon acquisition rate
d)
Sample analysis rate
15.
Permanent wilting point is the lower limit of
a) Available water
b) Field
capacity
c)
Capillary water
d)
Saturation percentage
16.
pH of soil is also known as
a) Soil reaction
b)
Porosity
c)
Bulk density
d)
None of these
17.
RSC stands for
a) Residual sodium carbonate
b)
Resistant sodium and carbon
c)
Relative sodium carbamate
d)
Resistant sulphur compounds
18.
Total soluble salts is synonymous of
a)
Electrical conductivity
b)
Cation exchange capacity
c)
Anion exchange capacity
d) Total dissolved salts
19.
Cl_ is an example of
a) Anion
b)
Cation
c)
Molecule
d)
Neutral atom
20.
Calculation used for determination of sodicity of
soils is
a) Residual sodium carbonate
b)
Sodium adsorption ratio
c)
Exchangeable sodium percentage
d)
Electrical conductivity
21.
________________
is the soil extract taking by sucking water from saturated soil paste
a) Soil saturation extract
b)
Extract
c)
Soil solution
d)
Soil suspension
22.
Most important effect of ___________is decrease in
Availability of O2
a)
Salinity
b) Water-logging
c)
Photosynthesis
d)
Respiration
23.
Rice can withstand flooding due to development
of__________ tissue
a) Aerenchyma
b)
Parenchyma
c)
Sclarenchyma
d)
Epidermal
24.
Layer of salts and soil particles found on the
surface of dry saline soils is
a)
Salt crust
b)
Soil crust
c)
Hard-pan
d)
Surface crust
25.
_________ is the atomic weight, formula weight or
molecular weight expressed in grams
a)
Mole
b)
Gram equivalent
c)
Mole fraction
d)
Normality
26.
Relative proportion of different soil separates is
called
a)
Structure
b)
Texture
c)
Bulk density
d) Pore space
27.
Water-logging is a condition in which soil pores are
filled with
a)
Air
b)
Water
c)
Air and water
d)
Fluid
28.
The surface below which the soil is saturated with
water is known as
a)
Water-logging
b)
Water table
c)
Rhizosphere
d)
Rhizoplane
29.
The climate of Pakistan is
a)
Tropical
b)
Arid
c)
Semi-arid
d)
Both b and c
30.
Accumulation of salts at the soil surface is
characteristic of _______ areas
a)
Humid
b)
Sub-humid
c)
Tropical
d)
Arid and semi-arid
Answer Key
|
11 |
a |
|
12 |
d |
|
13 |
a |
|
14 |
a |
|
15 |
a |
|
16 |
a |
|
17 |
a |
|
18 |
d |
|
19 |
a |
|
20 |
a |
|
21 |
a |
|
22 |
b |
|
23 |
a |
|
24 |
a |
|
25 |
a |
|
26 |
b |
|
27 |
b |
|
28 |
b |
|
29 |
d |
|
30 |
d |
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