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Soil Science-4

Q.1
As increase in age of animal nutrient content of dung_________.

increases
decreases
unaffected


Q.2
Which crop is most suitable for green manuring?
Dhaincha
Sunhemp
Cowpea


Q.3
Equivalent acidity (lime lost) of Urea is_________.
110
128
80


Q.4
Mycorrhiza is most suitable for the absorption of______________.
N
P
K


Q.5
Which growth regulators is used as anti transparent?
Abcisic Acid
Cytokinins
gibberlines


Q.6
In India, which is not soil conservation Research Demonstration and Training Centre?
Dehradun
Kota
Udaipur

Q.7
How many Central Soil and water conservation Research Centers are serving in India?

9
8
20


Q.8
The size of particles for saltation ranges___________.
0.01 – 0.05 mm
0.1 – 0.2 mm
0.1- 0.5 mm


Q.9
Which is a dominant type of mechanism responsible for soil erosion?
Suspension
Saltation
Surface creep


Q.10
Critical wind velocity is known as__________.
minimum fluid threshold velocity
maximum fluid threshold velocity
balance fluid threshold velocity


Q.11
Which is most harmful stage of water erosion?
Sheet Erosion
Rill Erosion
Gully Erosion


Q.12
Universal soil loss equation was given by_______.
Wischmeir and Smith
Ramamurthy
Thompson and Way


Q.13
Bench terracing is practiced on slopes ranging_________.
10.-20%
16-33%
15-30%


Q.14
At 0˚C the value of dissolved oxygen is_______.
14.6 mg/lit.
15.2 mg/lit
11.3 mg/lit


Q.15
Which heavy metal accumulates in soil by the regular use of phosphatic fertilizers?>
Cu
Pb
Cd


Q.16
Acid rain is mainly due to__________.
Oxides of sulphur
Oxides of nitrogen
Both


Q.17
Which solid component has highest total charge and surface area?
Vermiculite
Montmorillonite
Illite


Q.18
Which is not a Chemical indicator?
Crusting
pH
Salinity


Q.19
Which ion is responsible for the formation of black alkali soils?
Cl
S
Na


Q.20
The process of breakdown of H- clay under alkaline condition is known as________.
alkalinization
Solonization
Solodization


Q.21
Which state have maximum area under salt affected soils?
Gujarat
Rajasthan
UP


Q.22
Which salts are dominat in saline soil?
Na
K
Ca


Q.23
Which salts are dominat in Alkali soil?
Na
K
Ca


Q.24
Ion responsible for dispersion of soil colloid is_________.
Na
K
Ca


Q.25
In which form the Na will leach down when gypsum applied to alkali soils?
Na2CO3
Na2SO4
Na2CO3

Number of score out of 25 = Score in percentage =


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