Important Soil science mcqs for all types of agriculture related to soil test preparation online.
Soil Science MCQs
The inner shell of earth consists of _______?
A. Fe
B. Silicate
C. Mg
D. Silicate of Fe & Mg
Fine-graned rocks formed on earth crust are called _________?
A. Intensive igneous rock
B. Extrusive rock
C. Sedimentary rock
D. Plutonic
Which rock contain potash feldspar ?
A. Syeruite
B. Gabbro
C. Norile
D. All the above
The site of grains present in sands structuring range ________?
A. 1.00 0.0625 mm dia
B. 0.0625 mm dia
C. 0-1.0 mm dia
D. None of the above
Rocks formed from compacted clay or mud are called _______?
A. Shale
B. Clay stone
C. Sand stone
D. None of the above
Which rock is harder _______?
A. Metamorphic
B. Sedimentary
C. Igneous
D. Sand stone
Most abundant mineral in the earth crust is ______?
A. N-Feldspar
B. Feldspar
C. S-Feldspar
D. Amplubole
Which compound is mostly used in Pakistan for the reclamation of saline-sodic & sodic soils ____?
Geochemical weathering processes occurs _________?
A. On surface
B. Below soil solum
C. At the level
D. On the mountain
Color off basic matic rock is ______?
A. Light green
B. Dark colored
C. Yellow
D. Blue
Igneous rock whose crystal is 1 cm called ______?
A. Plutonic
B. Felsic
C. Pegmatitic
D. Mafic
Thick concordant bodies which force the overlying sediments to form dome-shaped hills are called ______?
A. Laccoliths
B. Pegmatic
C. Dike
D. Batholiths
Places where volcanoes occur are _____?
A. Pacific ocean
B. Mid-Atlantic ridge
C. Mediterranean sea
D. All the above
Large pieces of erupted magma are called ______?
A. Volcanic ash
B. Volcanic block
C. Dike
D. Sill
Weathering of gabbros gives ______?
A. Sand and clay
B. Clay and iron oxide
C. Clay and Mg oxides
D. Sand and iron oxide
Which one of the following is physical property of soil _____?
A. Hydration
B. Oxidation
C. Reduction
D. None of the above
Which soil bolds more water ?
A. Sandy
B. Stony
C. Clayey
D. Sitry
Which soil is suitable for nce ______?
A. Fine textured
B. Coarse textured
C. Sandy
D. None of the above
The aggregation of individual particles is called _____?
A. Granulation
B. Texture
C. Flocculation
D. Structure
Color of fertile soil is _______?
A. White
B. Green
C. Brown
D. Black
Weathering is _______?
A. Destructive process
B. Constructive process
C. Both a & b
D. None of the above
Who gave the equation for study of soil property ?
A. Ziebig
B. Newton
C. Neil
D. Jenny
The nutrient particularly influencing root growth is ______?A. Zinc
B. Nitrogen
C. Organic
D. Phosphorus
Who characterized soil formation as set of “4” process _______?
A. Jinney
B. Ziking
C. Newton
D. Simonson
Slipperiness is due to _______?
A. Covalent bond
B. Vander walls forces
C. Wire bond
D. None of the above
Which element can be fixed by smecitite ______?
A. Mgº
B. Kº
C. NH2
D. Both b & c
Permanent change in soil is due to _____?
A. Ionic bonding
B. pH change
C. Covalent bonding
D. Isomorphic substitution
Gravimetric water is present in ________?
A. Micro pores
B. Macro pores
C. Meso pores
D. None of the above
Vertical movement of water was studied by _____?
A. Ziebig
B. Darcy
C. Kohler
D. Niel
When two or more functional groups of single ligand are coordinated to metal cation the complex is termed as ________?
A. Chelate
B. Solution complex
C. Complex ion
D. All the above
pH of Pakistani soils is ______?
A. 7.5
B. 12
C. 7
D. 14
Identify the fertilizer (s) containing potassium ______?
A. SOP
B. MOP
C. Chilean salt peter
D. All the above
A soil is classified as sodic soil when ______?
A. EC is 8.5
C. SAR is >13
D. All the above
The available from of nitrogen for plant is ____?
A. NO3
B. NH4
C. Both a & b
D. None of the above
The molar mass of NaCl is _______?
A. 56.58
B. 43.28
C. 50.58
D. 58.58
The available form of calcium to plant is _____?
A. Ca(free cation
B. CaO
C. Ca
D. None of the above
International atomic weight of potassium is _____?
A. 39.0
B. 40.0
C. 41.0
D. 38.0
The chemical formula of urea fertilizer is ________?
A. NH2CONH2
B. [CO(NH2)]
C. Both a & b
D. None of the above
Mineral soil contain organic carbon ___?
A. >4%
B. 5%
C. <20%
D. >10%
Histols are found in _______?
A. Pakistan
B. Canada
C. Alaska
D. Both b & c
Elements essentially required for growth of all plants species are _______?
A. 32
B. 15
C. 16
D. 3
Problem of erosion in Thal and Cholistan is due to ________?
A. Wind
B. Fire
C. Water
D. Atmosphere
Age of Earth is _______?
A. 4.5 billion years
B. 4 billion years
C. 1 billion years
D. 6 billion years
Lithosphere refers to _______?
A. Zone of atmosphere
B. Zone of earth crust
C. Zone of ozone
D. Zone of water
The soil of Sindh (Pakistan) have pH _____?
A. 5.0 to 6.5
B. 6.5 to 7.5
C. 7.5 to 8.5
D. 8.5 to 9.5
Rhyolite in nature is _______?
A. Acidic
B. Basic
C. Both a & b
D. None of the above
Rocks which are formed by disintegration of pre-existing rocks by weathering are ______?
A. Sand stone
B. Classics
C. Igneous
D. Greis
Silt stones consists of grains whose size range from _______?
A. 0.625 mm
B. 0.004 mm
C. 0.0625 mm
D. Both b & c
Metamorphic rocks are formed from _______?
A. Igneous rocks
B. Sedimentary rocks
C. Both a & b
D. Cleavag
Schist is example of ______?
A. Stone
B. Name of mountain
C. Metamorphic rock
D. None of the above
Which mineral contain phosphorus _____?
A. Igneous
B. Metamorphic
C. Apatite
D. None of the above
How many different minerals deposits are found in Pakistan ?
A. 100
B. 60
C. 30
D. None of the above
Plutonic rocks are also called _______?
A. Intrusive igneous
B. Metamorphic
C. Sedimentary
D. Extrusive igneous rock
Felsic rocks consists of ______?
A. fe
B. Quartz
C. Buiotitic
D. Quartz & Feldspars
Structure and size of aphantic rock is _____?
A. Course-grained like
B. Fine grained
C. Large-Glassy
D. Phenocryst
Thickness of Dikes ranges from ______?
A. 2-10 m
B. Few m 10 m
C. Few cm 10 cm
D. 10-12 cm
Rocks having coarse bubble holes are called __________?
A. Purr ice
B. Mafic
C. Scoria
D. Felsic
Tuff is ______?
A. Soil
B. Water
C. Volcanic ash
D. Consolidated ash
Attraction between similar particles is called _____?
A. Adhesion
B. Cohesion
C. Vander wall
D. All the above
Process of mixing soil by fauna and flora is called ______?
A. Lessivage
B. Pedoturbation
C. Leaching
D. Enrichment
Most widely spread mineral in the world is _____?
A. Iron
B. Kaolinite
C. Salt
D. None of the above
Soil particles having diameter greater than 2 mm are called ________?
A. Clay
B. Silt
C. Sand
D. Gravel
Which instrument is used for determining soil texture _______?
A. Lysimeter
B. Hydrometer
C. Thermometer
D. All the above
Physical condition of soil for plant growth is called _________?
A. Granulation
B. Tillage
C. Tilth
D. All the above
Pneumatic potential is due to _______?
A. Water
B. Petrol
C. Soil
D. Gas
Product of microorganism that appears to chelate calcium is called ________?
A. Pyruive acid
B. 2-ketoghconic acid
C. Carbon dioxide
D. Phospheric acid
Which is passive factor of weathering ?
A. Climate
B. Parent material
C. Organisms
D. Temperature
Mollic refers to ______?
A. B-horizon
B. C-horizon
C. U-horizon
D. Surface horizon
Kaolinite can be identified by _______?
A. Spectrophotometer
B. Boiling
C. X-ray diffraction
D. Breaking
Shrinking and swelling is property of ____?
A. Clay
B. Silk
C. Water
D. Smecitie
Size of clay particle is ______?
A. 0.02mm
B. 0.2mm
C. 0.002mm
D. 2mm
Soil water can be determined by ______?
A. Mass water content
B. Macro pores
C. Both a & b
D. None of the above
Which one of the following are macro nutrients _______?
A. N,P,K
B. C,H,O
C. Ca,Mg,S
D. All the above
An ion or molecule in the coordination sphere central ion is called _______?
A. Complexion
B. Ligand
C. Chelate
D. Potential
Ligands that occur in Pakistan soils are ________?
A. OH1 HCO2
B. SO4-2 OH
C. CO3-2 SO4-2
D. All the above
pH in coniferous forest is _______?
A. Less than 7
B. Neutral
C. Greater than 7
D. Basis
A soil is categorized as saline when EC of saturation extract is _____?
A. >4dsm-1
B. 0.4dsm-1
C. 0.4 4.0 dsm-1
How much percentage of soils of Pakistan are deficient in P _______?
A. 60
B. 50-70
C. 80-90
Microorganisms have C/N ratio of _________?
A. 2:1
B. 4:1
C. 12:1
D. 20:1
The zorawar is brand name of ______?
A. TSP
B. DAP
C. MAP
D. None of the above
The factor used for conversion of P to P2O3 is ________?
A. o.453
B. 0.643
C. 0.436
D. None of the above
Acid soil contain pH _______?
A. <7
B. >7
C. >7.0
D. 8.5
DAP fertilizer available in Pakistan contains _________?
A. 18% N & 46% P2O5
B. 46%N & 18%P2O3
C. 100%P2O3
D. 50%P2O3
Buffer solution is a solution which resist change in ________ ?
A. pH
B. SAP
C. EC
D. RSC
The term applied to a material which tends to absorb moisture from the atmosphere is called ______?
A. Capillary
B. Hydroscopic
C. Available
D. Gravitational
The kaolininte is a layer silicate clay mineral, it is 1:1 type of mineral with _____?
A. 3-15 meq/100g CEC
B. 40 meq/100g CEC
C. 50 meq/100g CEC
D. None of the above
A compound toxic to crop formed by the thermal decomposition of urea is _____?
A. Uric acid
B. Biurct (NH2CONH CONH2 H2O)
C. Diuret
D. Both b & c
The unit of electrical conductivity is _______?
A. dsm-1
B. mmhos/m
C. ms/cm
D. Al the above
The reaction of Na2 CO3 salt is ________?
A. Alkaline
B. Neutral
C. Acidic
D. None of the above
Most of the productive soils in Pakistan have pH ________?
A. Between 7.5 to 8.5
B. 8.5
C. None of the above
The deficient level of N (%) in plants suggested by various workers is ____?
A. 0%
B. 3%
C. 5%
D. 10%
The chemical formula of Hematite is ________?
A. AL (OH)2
B. Fe2O3
C. Fe OOH
D. None of the above
The little clay mineral is ______?
A. Non-expending
B. Expending
C. None or little expending
D. None of the above
The net reaction of photosynthesis is ________?
A. CO2 + H2O light O2 + (CH3O)
B. CaCO3 + 2HCl CaCl2 H2O+CO3
C. ((CH2O) + O2 CO2 + H2O)
D. None of the above
Solution containing molecular weight of a substance in gram per liter of a solution is known as ______?
A. Normal
B. Molal
C. Molar
D. None of the above
A soil with an ESP greater than 15 is usually classified as _______?
A. Sodic soil
B. Saline soil
C. Acidic soil
D. None of the above
pF unit is used for the measurement of ______?
A. Hydraulic potential
B. Hydraulic conductivity
C. Negative soil water potential
D. All the above
The symbol of Na stands for ______?
A. Nickle
B. Natrium
C. Neon
D. None of these
The moisture content below which a cohesive soil does stick to metal tools is known as _______?
A. Liquid limit
B. Plastic limit
C. Sticky limit
D. Alter berg limit
Formula used for the calculation of sodium absorption ratio is _______?
A. SAR=Na / [(Ca+Mg)1/2] Na x 2
B. SAR=Na / CEC x 100
C. SAR=Na / CEC x 100
D. None of these
Mean annual precipitation for tundra region is ______?
A. 70-80 cm
B. 150-70 cm
C. 0-50 cm
D. None of the above
Equation of Ozone is ________?
A. O2 + O =O3
B. O3 + O
C. O2 O
D. None of the above
The earth core is made of the following metals ______?
A. Fe & Ni
B. Mg & Ni
C. Cu & Ni
D. None of these
Corrositivity of water is an indication of _______?
A. Salinity
B. Property of polluted material
C. Both a & b
D. None of the above
Cyclic salts are mostly of _____?
A. SO4
B. HCO3
C. Cl–
D. None of the above
Total salt affected soils of Pakistan are ________?
A. 6.3 m ha
B. 5.0 m ha
C. 12.3 m ha
D. 10.5 m ha
Salt-tolerant plants are called ____?
A. Glycophytes
B. Halophytes
C. Xerophytes
D. All the above
Gold is _______?
A. Native element
B. Secondary element
C. Primary element
D. Heavy metal
Na and k can be determined by the use of _______?
A. Hydrometer
B. Flame photometer
C. Spectrophotometer
D. All the above
The problem of soil crosion Thal and Cholistan is predominantly due to _______?
A. Wind
B. Air
C. Water
D. All the above
Addition of sodium hexametaphosphate in soil for determination of soil texture causes ______?
A. Agregation of soil particles
B. Cementing of soil particles
C. Dispersion of soil particles
D. All the above
The process of accumulation of excess quantity of nutrients in water causing O2 deficiency is known as ________?
A. Eutrophication
B. Nitrification
C. Denitrification
D. Sedimentation
Chromium (Cr) is a _____?
A. Macro element
B. Secondary element
C. Heavy metal
D. Free element
Percentage of N in Ammonium sulphate fertilizer is ______?
A. 23
B. 35
C. 45
D. 21
The available form of sulphur for plant is _______?
A. S2
B. SO-2
C. SO3
D. SO2
The plant in which CO2 fixation is solely via the Calvin cycle is _____?
A. C
B. CAB
C. C
D. CAM
Gravimetric water is present in _____?
A. Microspores
B. Macrospores
C. Mesopores
D. Nanopores
Sugar cane is _____?
A. C3 plant
B. C4 plant
C. C2 plant
D. None of the above
The lower limit of available water is called _______?
A. Field capacity
B. Wilting point
C. Available water
D. Hygroscopic water
[(NH4)2SO4FeSO66H2O] is the formula of _________?
A. Ammonium sulphate Iron sulphate
B. Sodium ammonium sulphate
C. Ferrous Ammonium sulphate
D. None of the above
C12H12N-NaO8S2 is the chemical formula of ______?
A. Activated charcoal
B. Azomethine H
C. Carbonated sodium sulphate
D. None of the above
The formula used for calculating RSC is _____?
A. RSC=(CO32 + HCO2) (Na + K + Ca2 + Mg2)
B. RSC=(CO32 + HCO2) ( Ca2 + Mg2)
C. None of the above
D. non of these
While handing concentrated acids. bases or other hazardous chemicals use ___?
A. Table
B. Fume hoods
C. Both a & b
D. None of the above
An expression of the intensity of the basic or a acidic condition of a liquid or of soil is called _________?
A. ESR
B. SAR
C. EC
D. pH
The conductivity of a saturation extract is greater 4 dsm-1 an exchangeable sodium percentage (ESP) of less than 15 and the pH is usually less than 8.5 is called as ____?
A. Saline soils
B. Saline-sodic soils
C. Sodic soils
D. Neutral soils
Chitin and steroids are _______?
A. Lipids
B. Carbohydrates
C. Proteins
D. Waxes
Secondary air pollution is _________?
A. HNO3
B. CO3
C. CO2
D. All the above
Permanente wilting point of clayey soils is not less than _________?
A. 20%
B. 10%
C. 5%
D. 15%
Urea in manufactured form gases ________?
A. NH3
B. NH48CO2
C. NH3 & CH4
D. All the above
Acid soils of the world’s arable comprise up to ________?
A. 40%
B. 30%
C. 58%
D. 20%
The time for which water and ion remains in vicinity is called _____?
A. Primary hydration
B. ppm
C. Normality
D. Residence time
Common soils found in Pakistan are ________?
A. Arid soils
B. Inceptisols
C. Entisols
D. All the above
Examples of micro biota are _________?
A. Protozoa
B. Virus
C. Both a & b
D. None of the above
Which bacteria causes fermentation _______?
A. Azotobacter
B. Bacillus
C. Pseudomonas
D. Corey
Widely spread saprophytic fungi is _______?
A. Basidiomycetes
B. Ascomycetes
C. Endospore
D. None of the above
Which compound decay slowly ______?
A. Amino acid
B. Lignin
C. fats
D. Cellulose
Who gave the defination of humic acid ?
A. Gapon
B. Felbeek
C. Neir
D. Liekig
Extraction of humic substance can be done by _________?
A. NaOH
B. NH4Cl
C. NH4OH
D. None of the above
The complex fertilizer Nitrophos available in the market contains _______?
A. 25%N & 23% P2O3
B. 46%N & 23% P2O3
C. 23%N & 23% P2O3
D. None of the above
Radiation can be detected by the blankening of photographic film or by using ______?
A. Ratio autoanalyser
B. GM counter
C. Neutron probe
D. Dosimeter
Nitrification is the microbial conversion of _____?
A. NH nitrogen the NO3 nitrogen in soil
B. NO2 to NO3 nitrogen in soil
C. NO3 nitrogen to NH4 + in soil
D. None of the above
The exact chemical formula of DAP fertilizer is _______?
A. (NH2) HPO4
B. NH4H2PO4
C. NH4H2PO4
D. Both a & c
According to WAPDA, the ECe of the salt free soil should remain ____?
A. < 4 dsm-1
B. Equal to 4 dsm-1
C. 4-8 dsm-1
D. None of the above
The EC: SAR and RSC values suggested by WAPDA for 3rd class irrigation water(C,S,R,) are ______?
A. ECi:<1.5, SAR < 10 & RSC< 2.5
B. ECi:>1.5, SAR > 10 & RSC> 2.5
C. ECi:>1.5, SAR 2.5
D. Both a & b
The exact formula for calculating the base saturation percentage is ________?
A. Bas saturation percentage = CA+Mg+Na / CEC x 100
B. Bas saturation percentage = /CEC / CA+Mg+Na x 100
C. Bas saturation percentage = /CEC / CA+Mg x 100
D. None of the above
The toxicity level of Zn (mg/kg) in plants suggested by some workers is ___?
A. > 50 mg kg-1
B. > 10 mg-1
C. > 400 mg kg-1
D. None of these
The chemical formula of Dolomite is _____?
A. CaMg (CO3)2
B. MgCO3
C. CaCO3
D. None of the above
Auxins promote _____?
A. Cell elongation
B. Cell division
C. Both a & b
D. None of the above
Deep percolation from a soil profile is generally measured by a device known as ____?
A. Hydrometer
B. Lysimeter
C. Thermometer
D. Tensiometer
The particlesw density of a mineral soil is about ______?
A. 2750 Kg m-3
B. 2550 Kg m-3
C. 2650 Kg m-3
D. None of the above
The safe limit of No2 in drinking water is _______?
A. 10 mg L-1
B. 15 mg L-1
C. 20 mg L-1
D. None of the above
The device used for the measurement of positive pressure potential of soil water is known as ______?
A. Lysimeter
B. Tensiometer
C. Piezometer
D. Barometer
Soil structure without aggregation is known as ______?
A. Platy
B. Granular
C. Massive
D. Both b & c
The water loss through transpiration from vegetative and evaporation from soil surface is known as ______?
A. Evaptranspiration
B. Transpiration
C. Evaporation
D. Guttation
Perfect hardness of any mineral is determined by ________?
A. Mho’s scale
B. pH scale
C. Foot scale
D. None of the above
Primary air pollution is ______?
A. SO
B. SO3
C. SO2
D. None of the above
Algal photosynthesis increases pH of water and releases _______?A. O2
B. CO2
C. SO3
D. All the above
The atmospheric layer lies closest to the earth surface is known as ______?
A. Mesosphere
B. Thermosphere
C. Troposphere
D. Stratosphere
Accumulation of soluble salts root zone is known as _______?
A. Desodication
B. Sodication
C. Degradation
D. Salininzation
Na2CO3 salts is ______?
A. Neutral
B. Alkaline
C. Acidic
D. None of the above
Electrical conductivity of saturated paste is written as _____?
A. ECP
B. ECe
C. ECs
D. Ecw
The science of growing terrestrial plants in an aerated solution is known as ______?
A. Nutrient film technique
B. Hydrology
C. Hydrants
D. Hydroponics
The wearing away of the land surface by wind, water, ice or other geological agents is called ________?
A. Seepage
B. Soil erosion
C. Soil contamination
D. All the above
Material deposited by the wind is called _______?
A. Regolith
B. Colluvial
C. Alluvium
D. Eolian
Rocks formed from molten magma are called ____?
A. Sedimentary rocks
B. Igneous rocks
C. Alluvial rocks
D. All the above
Deficiency of B can be corrected through application of chemical fertilizer of _______?
A. Solubor
B. Boric acid
C. Borax
D. All the above
Clear water with organic matter or sediment and minimum biological activity is known as ______?
A. Oligotrophic
B. Mestrophic
C. Eutrophic
D. Hydrotrophic
Sewage water consists of water and solids in the following percentage _____?
A. 99 & 1
B. 90 & 10
C. 80 & 20
D. None of the above
Percentage of N in Ammonium ritract fertilizer is ______?
A. 21
B. 23
C. 33
D. 39
Antioxidant is used to reduce the process of _______?
A. Reduction
B. Oxidation
C. Both a & b
D. Dehydration
Humic acid is soluble in ______?
A. Acid
B. Alkali
C. Both a & b
D. Distilled water
TSP contains _______?
A. 14%
B. 46%P
C. 40%P
D. 50%P
Which silica mineral is present in soil in abundant quantity _______?
A. Quartz
B. Smectite
C. Gypsum
D. All the above
The exact formula for sodium hexametaphosphate is _________?
A. [(NaPO6)13]
B. [(NaPO3)13]
C. [(NaPO2)6]
D. None of the above
The chemical formula for Ammonium acctatc is ______?
A. NH3OAC
B. NH4OAC
C. NH4AOC
D. Both b & c
Boron concentration is irrigation water is considered safe only upto _____?
A. 0.7 ppm
B. 1.5 ppm
C. 2 ppm
D. 3 ppm
Organic P content in soil, by ignition method is estimated by igniting the soil at _______?
A. 250ºC
B. 1000ºC
C. 550ºC
D. 1250ºC
While diluting acid always add ______?
A. Acid to water
B. Water to acid
C. Both a & b
D. none
Biochemical reduction of nitrate to nitrite or gaseous nitrogen is called _______?
A. Reduction
B. Oxidation
C. Denitrification
D. None of the above
A treeless artic plain is called as _____?
A. Glaciers
B. Barren land
C. Tundra
D. None of the above
Nitrogen gases are involved in ________?
A. Sleepy feelings
B. Hair disease
C. Mental disease
D. Acid rains
Particular matter consists of ______?
A. Solid and gases
B. CO2 & N
C. Solid and liquid
D. None of the above
Soil moisture and ET losses are ____?
A. Inversely related
B. Directly related
C. Not related
D. Occasionally related
The salinity can be reduced by the application of ______?
A. Lime
B. Sulphuric acid
C. Urea
D. All the above
The most abundant metal in the earth’s crust and toxic to plants in low concentration is ____?
A. Mo
B. Al
C. Fe
D. All the above
Point of zero change means ______?
A. All the covalent bonds
B. Zero charge at surface
C. All are ionic bond
D. None of the above
Part of soil which is in contact with root surface is called _____?
A. Rhizoshpere
B. Lithoshpere
C. Atmoshpere
D. None of the above
Examples of macrobiota are ________?
A. Enchytrids
B. Fungus
C. Bacteria
D. Plants
Which bacteria convert nitrite to nitrate _______?
A. Frankia
B. Nitrobacter
C. Pseudomonas
D. None of the above
In flood rice, snail feed on bacteria called ———-?
A. Helix
B. Limnea
C. Azolla
D. None of the above
Humic acid is soluble in ________?
A. Acid
B. Alkali
C. Both a & b
D. None of the above
Which mulch reduce soil temperature?
A. Polythene
B. White polythene
C. Black polythene
D. Both B&C
The tree sends down roots from its branches to the soil is know as:_______?
A. Oak
B. Pine
C. Banyan
D. Palm
Rhizosphere is:
A. Area with in the roots
B. Root surface
C. An area of soil in from root surface to 10 cm
D. An area of soil in immediate vicinity around root
The Tree sends down roots from its branches to the soil is known as ______?
A. Oak
B. Pine
C. Banyan
D. Palm
A set of soils with same parent material, topography, climate and biota but different age is called ___?
A. Topo sequence
B. Catena
C. Chrono sequence
D. Topography
The soils most prone to structural crusts are those which are higher in _______?
A. Clay content
B. Sodium content
C. Silt content
D. Both A & B
Micas have isomorphous substitution _____?
A. Predominantly in tetrahedral layer
B. Predominantly in octahedral layer
C. Both a & b
D. The statement is wrong
The water diffusivity has the units of: _____?
A. cm/s
B. s/cm
C. cm2
D. cm2/s
Sulphur is an essential component of _____?
A. Cystine
B. Cystein
C. Methionine
D. All of these
Read More: Agricultural Department MCQs related to all topics.
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