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Soil Science-5

Q.1
Gypsum equivalent of sulphur is_________.

0.57
0.18
1.62


Q.2
Lime requirement was given by_________.
Schooner
Shoemaker
Thompson


Q.3
Safe limit of irrigation water for RSC is_________.
<1.25
1.25-2.5
>2.50


Q.4
How many classes of water quality were developed by USSSL diagram?
12
14
16


Q.5
Availability of which nutrient is increases under acidic condition?
P
S
Fe


Q.6
The Head office of CSSRI is situated at__________.
kernal
Delhi
Nagpur

Q.7
Boron content of irrigation water (ppm) for boron sensitive crops are______.

0.3-1.0
0.3-0.7
1.0-2.0


Q.8
Which pesticides have highest consumption?
Insecticides
Herbicides
fungicides


Q.9
Black colour of alkali soil due to the presence of___________.
Na- Humate
K- Humate
Mg- Humate


Q.10
Water absorption by the plants in saline soil is adversely affected due to__________.
Low O.P. of soil
High O.P. of soil
Low O.P. of plant


Q.11
In general COD values of industrial wastes are__________.
more than BOD
less than BOD
equal to BOD


Q.12
DDT converts to DDE through_______.
Dehalogenation
Halogenation
Hydrogenation


Q.13
Crop tolerant to very high ESP level_________.
Rhodes grass
Rice
Wheat


Q.14
Soil Particle which is most susceptible to wind erosion is_______.
Clay
Sand
Silt


Q.15
Efficiency of amendments will depend on the materials__________.
fineness
purity
Both


Q.16
The pH ranges for most mineral soils is__________.
6.0 to 7.0
5.5 to 8.5
3.5 to 10.5


Q.17
The word soil is derived from____________.
Arabic
Latin
English


Q.18
Organic matter is a major source of_________.
N
S
Both


Q.19
Soil air contains much more amount as compare to atmospheric air?
Carbon di oxide
Oxygen
nitrogen


Q.20
Which horizon is also known as the zone of washing out?
A
B
C


Q.21
Which clay mineral has highest phosphate adsorbing capacity?
Illite
Kaolonite
Montmorillonite


Q.22
CEC [Cmol (p+) kg-1] of illite is__________.
15-40
3-15
50-60


Q.23
Temporary negative charge developed on silicate clays due to_________.
Isomorphous substitution
exposed crystal edges
Anion exchange


Q.24
Grasses and monocotyledons are generally preferred_________.
divalent cations
monovalent cations
trivalent cations


Q.25
Contact exchange phenomena are most important for the uptake of_______.
N
Zn
P

Number of score out of 25 = Score in percentage =


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