71.
Organic matter is usually written as
a) om
b) Om
c) oM
d) OM
72.
m.o. stands for
a)
Molecular oxygen
b)
Micro-organism
c)
Molecular oxidation
d) Membrane of organism
73.
Plant available water is the difference between
field capacity and
a)
Dry soil
b)
Permanent wilting point
c)
Available water
d)
Flooding
74.
16 elements are essentially required for growth of
_______
a)
Trees only
b)
Crops only
c)
Bush only
d)
All plant species
75.
Nutrients are taken up by the plants through the
process of
a)
Diffusion
b)
Mass flow
c)
Osmosis
d)
Root interception
76.
Silt fraction is rich in
a)
K
b)
Ca
c)
Mg
d)
Fe
77.
_______of individual soil particles into small groups
is called flocculation
a)
Dispersion
b)
Aggregation
c)
Separation
d)
Degradation
78.
Washing out of the soluble materials from the root
zone is
a)
Flushing
b)
Leaching
c)
Drainage
d)
Seepage
79.
Hydrated calcium sulphate is also called
a) Gypsum
b) Pyrite
c) Brucite
d) Mica
80.
Halophytes plants are capable of growth at
a)
Medium salt concentrations
b)
No salts
c)
Highly fertilized conditions
d)
High salt concentrations
81.
Salt-bush is an example of
a) Salt
sensitive plants
b) Moderately
tolerant plants
c) Halophyte
plants
d) Glycophyte
plants
82.
Root zone is the volume of the soil occupied by
a)
Plant roots
b)
Bulb
c)
Rhizome
d)
Tuber
83.
Saline agriculture is an approach of production from salt affected lands by
growing
a) Salt
tolerant plants
b) Leguminous
crops
c) Salt
sensitive plants
d) None
of these
84.
A nutrient required by plants in lower concentration
is
a) Micronutrient
b) Essential
c) Non-essential
d) Macronutrient
85.
A nutrient required by plants in
_______concentration is macronutrient
a)
High
b)
Low
c)
Very low
d)
Smaller
86.
Molarity is the moles of solute per
a)
Kg of solvent
b)
Litre of solution
c)
Kg of solution
d)
Kg of solution
87.
Normality is the no. of gram equivalents of solute
per
a)
Kg of solvent
b)
Litre of solution
c)
Kg of solution
d)
Kg of solution
88.
Residual sodium carbonate is represented by
a) RSC
b) Rsc
c) RSc
d) rSC
89.
Total dissolved salts is also known as
a) Electrical
conductivity
b) Cation
exchange capacity
c) Anion
exchange capacity
d) Total
soluble salts
90.
___________ is an example of cation
a) Cl-
b) SO4-2
c) NH4+
d) Both a
and b
91.
Sodium adsorption ratio is used for determination of
________ ___of soils
a) Acidity
b) Alkalinity
c) Sodicity
d) Salinity
92.
___________maintain growth at low salt concentration
but their growth is decreased at higher salt concentration
a)
Glycophytes
b)
Pteridophytes
c)
Gymnosperms
d)
Halophytes
93.
Soil saturation extract is the soil extract taking by sucking water
from
a) Dry
soil
b) Saturated
soil paste
c) Soil
solution
d) Soil
suspension
94.
Salt crust is the layer of salts and soil particles
found on _______ of dry saline soil
a) Depth
b) Subsurface
c) Root zone
d) Surface
95.
Soil texture is the relative proportion of different
a) Soil
separates
b) Rocks
c) Minerals
d) Elements
96.
_____________is a condition in which soil pores are
filled with water
a) Salinity
b) Water-logging
c) Sodicity
d) Alkalinity
97.
The major reason/reason for salinity in Pakistan
is/are
a) Low
rainfall b) High temperature c) Heavy rains d) both a and b
98.
The _____________ of Pakistan is arid to semi-arid
a) Location
b) Altitude
c) Latitude
d) Climate
99.
____________
is the ability of a soil to produce certain yield of a crop
a)
Soil fertility
b)
Soil productivity
c)
Soil ability
d)
Soil reaction
100.
_____of salts at the soil surface is characteristic
of arid to semi-arid areas
a)
Accumulation
b)
Leaching
c)
Flushing
d)
Removal
Answer Keys
|
71 |
b |
|
72 |
b |
|
73 |
b |
|
74 |
d |
|
75 |
b |
|
76 |
a |
|
77 |
b |
|
78 |
b |
|
79 |
a |
|
80 |
d |
|
81 |
c |
|
82 |
a |
|
83 |
a |
|
84 |
a |
|
85 |
a |
|
86 |
b |
|
87 |
b |
|
88 |
a |
|
89 |
d |
|
90 |
c |
|
91 |
c |
|
92 |
a |
|
93 |
b |
|
94 |
d |
|
95 |
a |
|
96 |
b |
|
97 |
d |
|
98 |
d |
|
99 |
b |
|
100 |
a |
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