Soil Science

51.       The local name for sodic soils is

a)       Thur

b)       Bara

c)       Thur-bara

d)       Shor

52.       The ____________soils are difficult to reclaim without using amendments

a)       Saline

b)       Sodic

c)       Saline-sodic

d)       Productive

53.       Saline-sodic soils initially have______________  permeability

a)       Good

b)       Poor

c)       No so good

d)       No

 

54.       Growth of Salt sensitive plants is sensitive to even ________ of salts

a) Moderate concentration

b) High concentration

c) Low concentration

d) Very high concentration

55.       For soil analysis of normal crop growing areas, soil samples are taken upto

a) 15cm b) 30cm c) 50cm d) 100cm

56.       The local name for saline-sodic soils is

a) Thur

b) Bara

c) Thur-bara

d) Shor

57.       The unit of electrical conductivity is

a) dSm^-1

b) molesm^-3

c) ohm

d) meL^-1

58.       Clay particles have the diameter of

a)       Less than 0.002mm

b)       More than 0.002mm

c)       0.002mm

d)       2.0 mm

59.       Salinity is the measure of concentration of ________ in a soil or solution

a) Salts

b) Roots

c) Leaves

d) Both b and c

60.    Silt particles have the diameter of

a)       Less than 0.002mm

b)       More than 0.002mm

c)       0.002mm

d)       2.0 mm

61.    Sand particles have ____________  charge

a) Negative

b) Positive

c) Neutral

d) None of these

62.    Soil structure is the tendency of soil to form

a) Aggregates

b) Clods

c) Bricks

d) Rock 

63.    Plants can not grow if they are irrigated with water of

a) High salinity

b) Low salinity

c) Medium salinity

d) Normal salinity

64.    The parameters used for determining fitness of irrigation water is

a) TSS

b) SAR

c) RSC

d) All of these

65.    Sodium adsorption ratio is commonly written as

a)       SdAR

b)       SAdR

c)       SAR

d)       SdAdR

66.    In __________ a no. of samples are bulked together

a) Grid sampling

b) Random sampling

c) Stratified

d) Composite sampling

67.    Electrical conductivity is  a measure of conductance of a substance to

a) Voltage

b) Ampere

c) Electromotive force

d) Electrical current

68.    _________of  like charges  is known as electrostatic repulsion

a)Attraction

b) Repulsion

c) Binding

d) Bonding

69.    _________refers to the zone of  Earth crust

a) Hydrosphere

b) Lithosphere

c) Stratosphere

d) Atmosphere

70.    A mineral is ______________  substance

a) Organic

b) Inorganic

c) Both a and b

d) None of

1, 2, 3, 4, 5, 6,

Answer Key 

51	a
52	c
53	a
54	c
55	a
56	c
57	a
58	a
59	a
60	d
61	c
62	a
63	a
64	d
65	c
66	d
67	d
68	b
69	b
70	d