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Soil Science-3

Q.1
Titratable acidity is also known as_________.

Reserve acidity
Active acidity
Total acidity


Q.2
________ ion synthesis chlorophyll in plant.
B
Mg
Fe


Q.3
________ is a high acid tolerant crop.
Wheat
rice
Tomato


Q.4
The deficiency of ______ ion causes marginal burning of leaves.
N
P
K


Q.5
The dominant salt in non-saline alkali soil is_________.
CaCO3
NaCl
Na2CO3


Q.6
The chemical formula of gypsum is__________.
CaSO4
CaCl2.2H2O
CaSO4.2H2O

Q.7
For the replacement of 1 me of exch. Na, it requires_____ kg gypsum/ha.

89
172
1926.4


Q.8
________ weed has been found very suitable for reclamation of alkali soil.
Argemone mexicana
Cyprus rotundus
Cynalon cactyolane


Q.9
_________ is sensitive to 10-20 ESP levels in soil.
wheat
beans
Carrot


Q.10
Most suitable option for increasing efficiency of nitrogenous fertilizers is called___________.
split application
deep placement
band placement


Q.11
The green manure crop should be turned in to the soil at stage.
vegetative
maturity
flowering


Q.12
The solid portion of sewage is known as_______.
FYM
sludge
compost


Q.13
Nitrification rate of castor cake is very slow due to_________.
Saponin
Nimbidin
Ricin


Q.14
Poudrette is prepared from_______.
night soil
blood meal
sludge


Q.15
On an average, FYM contains__________% Nitrogen.>
0.50
0.70
0.20


Q.16
In which form nitrogen absorbs by paddy in early stages?
NO3
NH4
NO2


Q.17
Urine of all animals contains more percentage of elements as compared to the dung portion.
N & K20
Ca &P2O5
Mg & N


Q.18
The biuret content (%) in urea should not exceed.
2.0
1.5
3.0


Q.19
Town compost contain________(%) N.
1.4
1.0
2.5


Q.20
Gas is generated due to anaerobic fermentation of organic material.
Methane
CO2
Oxygen


Q.21
Chief compound for most of the nitrogenous fertilizers are_________.
NH2
NH3
NO3


Q.22
Denitrification of nitrate fertilizers takes place under the condition.
saline
waterlogged
aerobic


Q.23
Addition of which increases the water holding capacity of sandy soil?
organic matter
chemical fertilizer
mineral matter


Q.24
Organic matter is the major source of__________.
N & P
P & S
Both


Q.25
In which soils maximum volatilization of ammonia occurs?
Acidic
neutral
Alkali

Number of score out of 25 = Score in percentage =


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