JNKVV & RVSKVV PhD Soil Science Entrance Exam 2023

JNKVV & RVSKVV PhD Soil Science Entrance Exam 2023

Q1. If the soil material transported by lake water is called?

• Aeolian
• Colluvium
• Lacustrine
• Loess

Answer

Q2. Arrange the following minerals based on their stability in decreasing order…?

• Biotite> Apatite> Anorthite> Olivine
• Anorthite> Apatite> Biotite> Olivine
• Anorthite> Biotite> Apatite> Olivine
• Biotite>Anorthite> Apatite> Olivine

Answer

Q3. The order developed without horizons or little development of horizons called as?

• Inseptisol
• Entisol
• Alfisol
• Aridisol

Answer

Q4. Total number of agro-ecological sub- regions (AESR) in India delineated by NBSS-LUP is…?

• 21
• 42
• 60
• 76

Answer

Q5. The boundary between soil and continuous coherent underlying material that has hardness more than 3 on Mohs scale, roots cannot penetrate through which is known as…?

• Paralithic contact
• Lithic contact
• Fragipan
• Duripan

Answer

Q6. The volume of water that runs off the soil surface and flows into streams during episodes of intense rainfall is called:?

• Runoff
• Erosion
• Splash erosion
• Sheet erosion

Answer

Q7. What is the value of pF scale at field capacity ?

• 7
• 18
• 5
• 53

Answer

Q8. Which is widely used dispersing agent in the Mechanical analysis ?

• Sodium carbonate
• Sodium
• Sodium hexa meta phosphate
• Sodium bicarbonate

Answer

Q9. When the horizontal dimensions are more developed compared to the vertical but units are thick then the type of structure of soil is called…?

• Platy
• Laminar
• Columnar
• Prismatic

Answer

Q10. The method of soil survey adopted for intensive cultivation is……?

• Detailed
• Reconnaissance
• Detailed-reconnaissance
• Semi-detailed

Answer

Q11. Chloride Hazard for irrigation water is given by:-?

• Jackson
• Schofield
• Schoonover
• Arnon

Answer

Q12. The structural rigidity of kaolinite is due to:-?

• K-bridge
• H bonding
• O-O bond
• Internal absorbed water

Answer

Q13. The manifestation of Physical forces like adhesion, cohesion with in the soil at various moisture constants called?

• Plasticity
• Consistency
• Soil crusting
• Soil compaction

Answer

Q14. Upper plastic limit measured by?

• Penetrometer
• Tensiometer
• Picnimeter
• Casagrande devise

Answer

Q15. Grey speck of oats is due to deficiency symptoms of …?

• Zn
• Mn
• Fe
• Cu

Answer

Q16. Velocity of flow liquid through porous medium is directly proportional to force causing flow and hydraulic conductivity of medium indicates?

• Stoke’s low
• Fick’s law
• Darcy’s law
• Henry’s law

Answer

Q17. The critical oxygen diffusion rate (ODR) value of soil in which roots of many plants will not grow is of the order of …………?

• 20 x 10-4 g cm-2 min-1
• 20 x 10-8 g cm-2 min-1
• 20 x 10-16g cm-2 min-1
• 20 x 10-12 g cm-2 min-1

Answer

Q18. In soil for micronutrient extraction, the pH of 0.005M DTPA is adjusted to?

• 5
• 3
• 3
• 5

Answer

Q19. The substance having same chemical composition but crystallizing of different form know as?

• Isomorphism
• Polymorphism
• Pleochroism
• Lattice

Answer

Q20. Fresh organic residues having C:N ratio is?

• <20:1
• >30:1
• <10:1
• >10:1

Answer

Q21. Blue baby disease is caused by?

• Lead
• Mercury
• Nitrate
• Fluoride

Answer

Q22. Which of the following structures are commonly found in sub-soil horizons in arid and semiarid soils??

• Block like
• Plate like
• Prism like
• Sphere like

Answer

Q23. DRIS is applicable for which crops??

• Short duration crops
• Oil seed crops
• Vegetables crops
• Long duration crops

Answer

Q24. Langmuir isotherm often describe successfully which one of the following?

• Chemisorption
• Physical sorption
• Multilayer adsorption
• Multilayer physical adsorption

Answer

Q25. Fe (Iron) essentiality given by?

• Gris
• Hargue
• Lewin
• Taubock

Answer

Q26. The movement of ions into the plant roots along with water is know as?

• Diffusion
• Mass flow
• Root interception
• Isomorphous substution

Answer

Q27. Conversion of ammonical nitrogen to nitrite in nitrification done by?

• Nitrosomonas
• Nitrobacter
• Bacillus
• Pseudomonas

Answer

Q28. Reduction of atmospheric nitrogen takes place at?

• Bacteroid
• Roots
• Leaves
• Stem

Answer

Q29. Conversion of organic matter to manure in short time by fermentation under controlled condition called?

• Composting
• Aminization
• Gleization
• Nitrification

Answer

Q30. Which of the fraction of soil organic matter is insoluble in both acid and alkali??

• Humus
• Humin
• Fulvic acid
• Humic acid

Answer

JNKVV & RVSKVV PhD Soil Science Entrance Exam 2023

Q31. In waterlogged area which gas is found abundantly__________?

• CO
• CO₂
• CH₄
• O2

Answer

Q32. The acidity which is having lowest magnitude?

• Active acidity
• Potential acidity
• Residual acidity
• Total acidity

Answer

Q33. If the gravimetric moisture content of soil is 15 % and the bulk density is 1.4 g/cc then the volumetric content is……?

• 18
• 21
• 15
• 25

Answer

Q34. The following instrument used to measure leaching and evapotranspiiration?

• Barometer
• Manometer
• Lysimeter
• Pycnometer

Answer

Q35. The order of organisms in soil according to their dominance?

• Bacteria>Fungi>Actinomycetes
• Bacteria>Actinomycetes>Fungi
• Actinomycetes>Fungi>Bacteria
• Fungi>Bacteria>Actinomycetes

Answer

Q36. …………… refers to a condition in which a crop needs more of the given nutrients yet had shown no deficiency symptoms?

• Bare economic optimum
• Luxury consumption
• Hidden hunger
• Toxicity of nutrient

Answer

Q37. Bangalore method for composting is…?

• Complete aerobic
• Complete anaeriobic
• Initially aeriobic then anaeriobic
• Initially anaeriobic then aeriobic

Answer

Q38. Rhizobium differs from Bradyrhizobium most importantly in?

• Acid production
• N fixing capacity
• Growth rate
• Nodulation pattern

Answer

Q39. In Chepil and Woddruff’s equation of soil loss calculation by wind erosion, E = F (IKCLV), where K denotes:-?

• Soil roughness
• Soil type
• Soil erodibility
• Rainfall factor

Answer

Q40. Which of the following genera do not contain species that fix nitrogen symbiotically?

• Rhizobium
• Nitrobacter
• Frankia
• Anabaena

Answer

Q41. Which position at the layer silicate has maximum specificity for K+ fixation??

• e-position
• position
• p- position
• r-position

Answer

Q42. The weight of a graduated cylinder is 54 grams, the cylinder is filled with 85 ml of oven dry field soil. The weight of soil and cylinder is 186 grams, the bulk density of the soil is ………g/cc?

• 65
• 15
• 35
• 55

Answer

Q43. In Kjeldahl digestion of soil for N estimation, which of the following reagent is used as catalyst ?

• Na₂SO₄
• K₂SO₄
• CuSO₄
• CaSO₄

Answer

Q44. The indicator we are using for determination of organic matter is?

• Diphenylamine
• Methyl orange
• Methyl red
• Phenophthalein

Answer

Q45. Akiochi disease in paddy is caused by…?

• Oxidation of S to SO₄
• Reduction of sulphate to sulphide
• Transformation of H₂S into SO₂
• Transformation of SO² into SO⁴

Answer

Q46. Estimation of available boron done by?

• Olsen’s method
• Brays no.1 method
• Ascorbic acid method
• Azomethine method

Answer

Q47. Nutrient diagnosis in soil by pot culture methods were first initiated by?

• Bousingault
• Mitcherlich
• Neubauer
• Mehlich

Answer

Q48. Sustainability Yeild Index (SYI) value lies between?

• 0-1
• Above 1
• -1 to +1
• 1 to 4

Answer

Q49. DEM refers to 😕

• Digital eclipe model
• Digital elevation model
• Digital equatorial model
• Digital ecological model

Answer

Q50. The second most deficient micronutrient in Indian soils after Zn is?

• B
• Cu
• Fe
• Mn

Answer

Q51. Which one of the following fertilizers has zero equivalent acidity??

• Ammonium sulphate
• Ammonium nitrate
• Anhydrous ammonia
• Calcium ammonium nitrate

Answer

Q52. The transport of ions across the electtrochemical gradient with consumption of metabolic energy called?

• Passive transport
• Active transport
• Metabolic absorption
• Diffusion

Answer

Q53. As per Beer-Lambert’s law, the relationship between optical density and transmittance (%T) of a coloured solution is given by?

• OD= log T
• OD = log 2.0 – T
• OD = 2.0 – log T
• OD = log T – 2.0

Answer

Q54. Scattering of detached soil particles by the impact of rain drops is called as…?

• Splash erosion
• Sheet erosion
• Gully erosion
• Ravines

Answer

Q55. Which of the following components of soil organic matter is most resistant to decomposition??

• Cellulose
• Lignin
• Hemi cellulose
• Starch

Answer

Q56. Which is the SI unit for CEC in soil?

• c mol (p+)/Kg soil
• d mol (p+)/Kg soil
• m mol (p+)/Kg soil
• M mol (p+)/Kg soil

Answer

Q57. If a soil is saline, but not alkali which is true?

• pH > 8.5, ECe <4 dS/m
• pH > 8.5, ECe >4 dS/m
• pH < 8.5, ECe >4 dS/m
• pH < 8.5, ECe < 4 dS/m

Answer

Q58. The genographic data symbolized as points, lines or polygons is known as?

• Raster data
• Vector data
• GIS data
• GPS data

Answer

Q59. Which of the following greenhouse gases has the highest global warming potential?

• CO₂
• CH₄
• N₂O
• N₂

Answer

Q60. The size of clay practices in soil is?

• 0 mm
• 0 μm
• < 2.0 μm
• 2 – 2.0 μm

Answer

Q61. Which is the correct form of Bray-1 reagent?

• 025 N HCl + 0.03 N NH4F
• 025 N H2SO4 + 0.03 N NH4F
• 05 N HCl + 0.03 N NH4Cl
• 05 N HCl + 0.01 N NH4F

Answer

Q62. Which of following metamorphic rock containing high carbon??

• Sand stone
• Anthracite
• Gneiss
• Slate

Answer

Q63. Formula of Albite mineral is?

• NaAlSi3O8
• KAlSi2O8
• CaAlSi3O8
• HAlSi3O8

Answer

Q64. Humic acid is?

• Soluble in water and insoluble in acid
• Soluble in water and insoluble in alkali
• Soluble in alkali and insoluble in acid
• Soluble in acid and insoluble in alkali

Answer

Q65. Redox potential can be expressed in terms of?

• pH
• hydrogen ion activity
• pe
• All

Answer

Q66. When the distance between colloidal surface and cation increases then bonding energy will?

• Increase
• Decrease
• Remain same
• First increase then decrease

Answer

Q67. The adsorbability of cation to a charged surface are in the order?

• Al₃⁺ > Ca₂⁺ > Mg₂⁺ > K⁺ = NH₄⁺> Na⁺
• Al₃⁺ > Mg₂⁺ >Ca₂⁺ > K⁺ = NH₄⁺> Na⁺
• Al₃⁺ > K+ > Mg₂⁺ >Ca₂⁺= NH₄⁺> Na⁺
• Na⁺ > Ca₂⁺ > Mg₂⁺ > K⁺ = NH₄⁺> Al₃⁺

Answer

Q68. Expression of Freundlich isotherm is?

• X = KC1/n
• X = KnC
• C/x = C/xm+1/xmK
• X = C/xm+ 1/xmK

Answer

Q69. Inverse ratio law was proposed by?

• Schofield
• Matson
• Poonia
• Lindsay

Answer

Q70. An anion or neutral molecule satisfies the secondary valency is known as?

• Link anion
• Ligand
• Polymer
• Complex

Answer

Q71. Maximum ligand adsorption will occur when?

• pH = pKa
• pH >pKa
• pH <pKa
• pH = pKa+pe

Answer

Q72. Electrical conductivity can be expressed as?

• EC= Resistance x L/A
• EC= Resistance x A/L
• EC= Conductance x L/A
• EC= Conductance x A/L

Answer

Q73. Lime requirement of acid soil is determined by using?

• DTPA method
• EDTA method
• KCl method
• SMP buffer method

Answer

Q74. Which is used as ameliorant for sodic soils?

• Lime
• SSP
• Basic slag
• Gypsum

Answer

JNKVV & RVSKVV PhD Soil Science Entrance Exam 2023

Q75. Zeta potential in sodic soil is?

• Very Low
• Low
• Medium
• High

Answer

Q76. Why MgSO4 is not used in amelioration of sodic soil??

• MgSO4 is highly soluble
• MgSO4 is less soluble
• MgSO4 does not replace Na
• MgSO4 is highly acidic in nature

Answer

Q77. Net immobilization of soluble P occur when C:P ratio is?

• < 200 :1
• < 100 :1
• > 100 :1
• > 300 :1

Answer

Q78. The regular arrangements of points in space is known as?

• Parameters
• Unit plane
• Bravais lattice
• Space lattice

Answer

Q79. In which silicate group there is no Si-O-Si linkage?

• Phyllosilicates
• Inosilicates
• Cyclosilicates
• Nesosilicates

Answer

Q80. Which type of mineral is Albite??

• Tectosilicates
• Sorosilicates
• Inosilicates
• Phyllosilicates

Answer

Q81. In crystal structure if the octahedral position is occupied by a trivalent cation then it is known as?

• Trioctahedral sheet
• Dioctahedral sheet
• Monooctahedral sheet
• None

Answer

Q82. Permanent negative charge developed in a clay mineral is due to?

• pH dependent charge
• Cation in the exchange site
• Isomorphous substitution
• H+ ion activity

Answer

Q83. Highest layer charge is in which mineral?

• Kaolinite
• Smectite
• Mica
• Vermiculite

Answer

Q84. Which one is a para-crystalline mineral with defects?

• Imogolite
• Allophane
• Kaolin
• Hallosite

Answer

Q85. pH value at which net surface charge is zero is known as?

• Isoelectric point
• Zeta potential
• Dorn potential
• Zero point charge

Answer

Q86. XRD is used to determine the d-axis spacing of clay mineral, this is done by the help of which law?

• Diffraction law
• Quantum law
• Miller law
• Braggs law

Answer

Q87. In India, topographical maps are prepared and published by?

• Indian institute of remote sensing
• ISRO
• Survey of India, Dehradun
• NRSA

Answer

Q88. Which refers the size of smallest object or area that can be described by sensor??

• Spectral resolution
• Temporal resolution
• Radiometric resolution
• Spatial resolution

Answer

Q89. In genetic classification of soils,Alluvial soils are?

• Zonal soils
• Azonal soils
• Intra-zonal soils
• All

Answer

Q90. The soil which are fluvial in nature and having stratified characteristic is known as?

• Lateritic soil
• Alluvial soil
• Red soil
• Deserts soil

Answer

Q91. Very dark colour in black soils is due to?

• Clay-humus comlex
• Titaniferous magnetite material
• Both A & B
• High Organic Matter

Answer

Q92. Silica : Sesquioxides ratio of Lateritic soils is?

• <0.1
• >2
• <2
• >10

Answer

Q93. Central Soil Salinity Research Institute is situated at?

• Dehradun
• Delhi
• Agra
• Karnal

Answer

Q94. The degree of buffering is highest in a pH range?

• 5 to 3.5
• 5 to 4.5
• 5 to 6
• 8 to 9

Answer

Q95. First operational remote sensing Satellite of India is?

• LISS
• LANDSAT
• INSAT
• IRS – 1A

Answer

Q96. Radar works in the wave length region of?

• UV
• Visible
• Microwave
• IR

Answer

Q97. Phosphorus is absorbed by plants from soil mostly by the process of?

• Mass flow
• Diffusion
• Root interception
• Dispersion

Answer

Q98. Which of the following is an analogue of Arsenic (V)?

• Nitrate
• Phosphate
• Sulphate
• Sulphide

Answer

Q99. The safe limit of NO3-N per litre of ground water is?

• 20 mg
• 45 mg
• 10 mg
• 5 mg

Answer

Q100. The uptake, transplocation and assimilation of which element is affected due to applied P?

• Mn
• Zn
• Cu
• B

Answer

 

JNKVV & RVSKVV PhD Soil Science Entrance Exam 2023

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