ICAR JRF Agronomy Previous Year Paper 2020 — Agri Master Mind
NDVI of a crop can be measured by using (JRF AGRO-2020)
- Leaf colour chart
- Chlorophyll meter
- Green Seeker
- Canopy analyzer
Each turn of β-oxidation spiral generates two reduced coenzymes in the form of (JRF AGRO-2020)
- Two NADH moles
- Two FADH₂ moles
- One NADH and one FADH₂ moles
- One NADH and one GTP moles
When an abnormal failure of rainfall occurs, the type of drought is referred to as: (JRF AGRO-2020)
- Seasonal drought
- Contingent drought
- Invisible drought
- Atmospheric drought
Maggots enter the stem and feed on the growing point of the central shoot, and the attacked tiller is converted into a shining structure called 'Silver Shoot.' It is due to which of the following pests? (JRF AGRO-2020)
- Rice Gundhi bug
- Rice root weevil
- Gall midge
- Rice hispa
Which of the following does not represent the use of rice husk? (JRF AGRO-2020)
- Source of plant nutrient
- Substrate for the production of biofertilizers
- Fuel
- Direct human consumption
Which of the following is NOT a variety of Chickpea? (JRF AGRO-2020)
- SCS-3
- PBG-1
- GNG-1581
- IPM 02-03
Which of the following statements regarding shifting cultivation is NOT true? (JRF AGRO-2020)
- Initially, it was a low-input and sustainable land-use system
- Now, it is not sustainable due to a drastic increase in the gestation period (shifting cycle)
- Now, it is not sustainable due to the drastic decrease in the gestation period (shifting cycle)
- It causes erosion and land degradation
Statement I: Ginning percentage, color, trash, fiber quality, and fiber length are the important commercial value parameters of jute Statement II: Ribboning, retting, and extraction are the quality-determining factors of cotton (JRF AGRO-2020)
- Both Statement I and Statement II are true
- Both Statement I and Statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
NIASM is located at: (JRF AGRO-2020)
- Baramati
- Nagpur
- Ranchi
- Jaipur
Statement I: India ranks 1st in the global market of essential oils of aromatic plants. Statement II: Production of essential oils of aromatic plants ranges from 22,000 to 23,000 t/year. (JRF AGRO-2020)
- Both Statement I and Statement II are true
- Both Statement I and Statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
The science that deals with the aspects of meteorology having direct relevance to agriculture is called... (JRF AGRO-2020)
- Atmospheric Sciences
- Environmental Science
- Agrometeorology
- Earth Science
Statement I: A vector in a GIS system is the graphic or visual data model. Statement II: ARC-INFO is a GIS Software. (JRF AGRO-2020)
- Both Statement I and Statement II are true
- Both Statement I and Statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
Statement I: Conservation agriculture involves no-tillage or drastically reduced tillage but biological tillage is allowed. Statement II: During the initial years of conservation agriculture, there is a heavy infection of weeds but it decreases with passing years. (JRF AGRO-2020)
- Both Statement I and Statement II are true
- Both Statement I and Statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
Which among the following phenomenon directly affects crop growth and yield? (JRF AGRO-2020)
- Competition for nitrogen
- Competition for water
- Competition for carbon dioxide
- Allelopathy
Which of the following is not a 1:1 type day mineral? (JRF AGRO-2020)
- Kaolinite
- Halloysite
- Nontronite
- Chlorite
A solution contains 1/10000 moles/l H+ ions. What is the concentration of hydroxyl ions in this solution? (JRF AGRO-2020)
- 10^-10 moles/litre
- 10^-4 moles/litre
- 10^10 moles/litre
- 10 moles/litre
The fertilizer phosphorus use efficiency under optimum condition is (JRF AGRO-2020)
- 10-15%
- 15-20%
- 20-25%
- 25-30%
Which of the following is released during the conversion of succinate to fumarate in the TCA cycle? (JRF AGRO-2020)
- CO2
- FADH2
- H2O
- ATP
ICAR-Central Research Institute for Dryland Agriculture is located at (JRF AGRO-2020)
- Jodhpur
- Hyderabad
- Rajahmundry
- Bikaner
The effective post-emergence control of Ageratum houstonianum can be achieved with (JRF AGRO-2020)
- Atrazine @ 3.5 kg ha^-1
- Pendimethalin @ 1.5 kg ha^-1
- Alachlor @ 2.0 kg ha^-1
- Thiobencarb @ 1.0 kg ha^-1
Given Below are two statements: Statement I: Organic manures contain a low amount of nutrients and are applied in large quantities. Statement II: Nutrient fractions in organic manures are in organic nature only. In the light of the above statement, choose the most appropriate answer from the options given below: (JRF AGRO-2020)
- Both Statement I and Statement II are true
- Both Statement I and Statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
What is the unit of SAR (sodium adsorption ratio)? (JRF AGRO-2020)
- Moles/litre
- me/litre
- (me/litre)^0.5
- (Moles/litre)^0.5
In soil plaque method of soil fertility assessment developed by Winogradsky, which micro-organism are studied? (JRF AGRO-2020)
- Azotobactor
- Aspergillus
- Both Azotobactor and Aspergillus
- Pseudomonas
Maximum emission of radiation from the sun takes place at the wave length (JRF AGRO-2020)
- 0.45 µm
- 0.55 µm
- 0.90 µm
- 1.0 µm
Electron transport inhibition in PS-II (Photosystem II) for herbicidal action is observed in (JRF AGRO-2020)
- Nitriles
- Ureas
- Triazines
- All of the above
The formulation of 2,4-D which is absorbed by plants is (JRF AGRO-2020)
- Ethyl ester
- Na - salt
- Amine - salt
- Isopropyl amine
The first confirmed occurrence of herbicide-resistant strain of a weed species in the US was associated with (JRF AGRO-2020)
- ALS inhibitors
- Bipyridillium
- Glycines
- Triazines
An amino acid induced during moisture stress condition and also known as stress indicator is (JRF AGRO-2020)
- Serine
- Tryptophan
- Glycine
- Proline
Chemiosmotic theory was put forward by: (JRF AGRO-2020)
- Peter Mitchell
- Paul Boyer
- John Walker
- Julius Sachs
Which of the following is a ceremonial weed? (JRF AGRO-2020)
- Cynodon dactylon
- Melilotus alba
- Chorchorus capsularis
- Mentha spicata
For the analysis of variance of data from plot sampling in a CRD with 't' treatment, 'r' replications, and 's' sampling unit per plot, sampling error will be. (JRF AGRO-2020)
- (r-1) (s-1)
- n(s-1)
- r(st-1)
- t (r-1) (s-1)
Identify the correct of the following methods of irrigation as per their water use efficiency from the maximum to minimum efficiency. (JRF AGRO-2020)
- Continuous flowing > flooding > Cablegation > Bubbler
- Bubbler > Cablegation > Flooding > Continuous flowing
- Cablegation > Flooding > Bubbler > Continuous
- Bubbler > Flooding > Continuous > Cablegation
The important biological control insect for Parthenium hysterophorus in India is. (JRF AGRO-2020)
- Zygogramma bicolorata
- Telebnemia scrupulosa
- Sida latifolia
- Orsioliella javanica
Which one of the following is NOT a quality parameter of rice grain? (JRF AGRO-2020)
- Milling quality
- Cooking quality
- Eating quality
- Curing quality
What will be the error d.f. for a R.B.D. field experiment with 8 treatments and 3 replications? (JRF AGRO-2020)
- 5
- 11
- 14
- 24
Ozone concentration in the atmosphere is reduced by - (JRF AGRO-2020)
- CO₂ and O₂
- H₂S and CH₄
- CFC and Cl₂
- N₂ and N₂O
Under dryland farming situation, which practice is most prominent? (JRF AGRO-2020)
- Single cropping
- Double cropping
- Relay cropping
- Multiple cropping
The higher number of resistant weeds are associated with which group of herbicides? (JRF AGRO-2020)
- Dinitroanilines
- Bipyridillium
- Synthetic auxins
- Triazines
Useful part of plantago (Psyllium) is. (JRF AGRO-2020)
- Root
- Shoot
- Seed husk
- Leaves
Weeds propagating through tubers - (JRF AGRO-2020)
- Cyperus rotundus
- Cirsium arvense
- Allium vineale
- Cynodon dactylon
Given below are two statements: Statement I: Ammonium sulphate can supply calcium and sulphur to crops. Statement II: Ammonium sulphate is the most suited nitrogen fertilizer. The options given below. (JRF AGRO-2020)
- Both statement I and Statement II are true
- Both statement I and statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
Post-emergence herbicide for weed management in rice is - (JRF AGRO-2020)
- Butachlor
- Bispyribac sodium
- Thiobencarb
- Nitrofen
Given below are two statements: Statement I: Circulation of air over tropic is dominated by Hadley cell and walker cell. Statement II: Hadley cell is associated with N-S direction and Walker cell is associated with E-W direction. In light of the above statements, choose the most appropriate answer from the options given below. (JRF AGRO-2020)
- Both statement I and Statement II are true
- Both statement I and statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
Given below are two statements: Statement I: Seedling blight, collar rot, stem rot, and root rot are the important fungal diseases of the jute crop. Statement II: Anthracnose is a major bacterial disease of jute. Choose the most appropriate answer from the options given below. (JRF AGRO-2020)
- Both statement I and Statement II are true
- Both statement I and statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
A weed with short-lived blue-colored flowers is - (JRF AGRO-2020)
- Erigeron canadensis
- Echinochloa colona
- Avena ludoviciana
- Commelina benghalensis
Principal objective of alley cropping is (JRF AGRO-2020)
- To get green and palatable fodder from hedge rows and reasonable yield of intercrops
- To maximize crop yield
- To control wind erosion
- To increase soil fertility
Chronological development in commercial use of herbicide is A. Triazines B. Phenoxyalkanoic acids C. Dinitroanilines D. Sulfonylureas E. Phenoxy (aryloxy) propionates. Choose the correct answer from the option given below. (JRF AGRO-2020)
- E-B-A-C-D
- A-B-C-D-E
- A-B-C-D-E
- B-C-A-E-D
Given below are two statements: Statement I: Waterlogging causes injury to crop due to low oxygen content and accumulation of hydrocarbon gases, hydrogen, sulphide, and carbon dioxide. Statement II: Ethanol production and activity of dehydrogenase decreases in roots of waterlogged plants. Choose the most appropriate answer from the options given below. (JRF AGRO-2020)
- Both statement I and Statement II are true
- Both statement I and statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
Given below are two statements: Statement I: Crop sequences involving cereals and pulses are commonly followed under the irrigated agro-ecosystem in the southern region of the Indian sub-continent. Statement II: One of the prominent cropping sequences followed in the irrigated agro ecosystem of southern India is rice-rice-green gram. Choose the most appropriate answer from the options given below. (JRF AGRO-2020)
- Both statement I and Statement II are true
- Both statement I and statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
The technique of growing plants with their roots suspended in air without soil is called (JRF AGRO-2020)
- Phytotronics
- Aeroponics
- Hydroponics
- Aerosols
Which of the following causes a 'resource' influencing competition in a weed-crop environment. (JRF AGRO-2020)
- pH
- Bulk density
- Water holding capacity
- Phosphorus
Choose the correct answer from the option given below. Chronology in the grass-weed growth stages is A. Booting B. Tillering C. Anthesis D. Dough E. Seedling. (JRF AGRO-2020)
- E-B-A-C-D
- A-B-C-D-E
- D-A-B-E-C
- E-D-C-D-A
Monocropping of tobacco is always discouraged as A. it leads to the development of pest and disease complex B. it decreases soil fertility C. it reduces germination of crops D. it leads to crop failure due to water stress E. curing becomes difficult. Choose the most appropriate answer from the option given below. (JRF AGRO-2020)
- A & B only
- A & C only
- A only
- D & E only
Given below are two statements: Statement I: Two contiguous watersheds are mostly similar in characteristics. Statement II: Each watershed unit is a well-defined topographically delineated area with a distinct boundary. Choose the most appropriate answer from the options given below. (JRF AGRO-2020)
- Both statement I and Statement II are true
- Both statement I and statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
The point at which CO₂ uptake exactly balances CO₂ release is called. (JRF AGRO-2020)
- Quantum yield
- Solar tracking
- Light compensation
- Threshold point
Given below are two Statements: Statement I: A remote sensing system that possesses only a sensor and depends on an external source to irradiate the target is called an active remote sensing system. Statement II: INSAT series of satellites are polar orbiting satellites. Choose the most appropriate answer from the options given below. (JRF AGRO-2020)
- Both statement Iand Statement IIare true
- Both statement Iand statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
Desmotubules are identified in which of the following organelles (JRF AGRO-2020)
- Golgi bodies
- Endoplasmic
- Cytoskeleton
- Plasmodesmata
Calculate the plant population of sugarcane in 1 ha area, if planted in paired row spacing of 60/120 cm and the number of canes in 4-metre row length is 50. (JRF AGRO-2020)
- 135000
- 138888
- 139888
- 140888
Given below are two statements: Statement I: A species is generally defined as a uniform interbreeding population spread over time and space. Statement II: A community is a group of populations of different species in a given area. In light of the above statements, choose the most appropriate answer from the options given below. (JRF AGRO-2020)
- Both statement I and Statement II are true
- Both statement I and statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
Arrange the following major events in dryland agriculture research in chronological order of their establishment: A. ICRISAT B. AICRP-DA C. ORPS D. KVK E. CRIDA. Choose the correct answer from the options given below. (JRF AGRO-2020)
- B-A-C-D-E
- A-B-C-D-E
- B-C-A-E-D
- C-D-E-A-B
Diara land comes under (JRF AGRO-2020)
- Salt affected areas
- High rainfall areas
- Flood prone areas
- Arid areas
Moisture availability index of 0.34 to 0.67 indicates which of the following class: (JRF AGRO-2020)
- Very deficient
- Moderate deficient
- Excessive moisture
- Adequate moisture
Plastids that contain high concentrations of carotenoid pigments rather than chlorophyll pigment are (JRF AGRO-2020)
- Leucoplasts
- Chromoplasts
- Amyloplasts
- Chloroplasts
Rate of transpiration in crop plants is maximum during (JRF AGRO-2020)
- Morning
- Little before noon
- After noon
- Evening
Which of the following weeds is a holo root-parasite? (JRF AGRO-2020)
- Loranthus
- Striga
- Orobanche
- Cuscuta
A Wheat crop growing in a 40-hectare area was irrigated with 10 cumecs of water for 6 hours. Water stored in the root zone was 30 cm. What is the field application efficiency? (JRF AGRO-2020)
- 0.2055
- 0.4444
- 0.5035
- 0.5555
The concentration of macronutrients in dry plant tissues is (JRF AGRO-2020)
- Less than 0.1 percent
- More than 0.01 percent
- Less than 0.01 percent
- More than 0.1 percent
Which among the following soil resource indicators gives the highest priority for evaluating agricultural sustainability? (JRF AGRO-2020)
- Weed intensity
- Soil pH
- Water table depth
- Soil organic matter
Nutrient index approach of soil fertility evaluation was proposed by (JRF AGRO-2020)
- Liebig
- Parker
- Mehlich
- Piper
Given below are two statements: Statement I: ATP synthase produces ATP as protons diffuse back through it from the lumen into the stroma. Statement II: Malate and aspartate are carboxylation products of the C4 cycle. In light of the above statements, choose the most appropriate answer from the options given below. (JRF AGRO-2020)
- Both statement I and Statement II are true
- Both statement I and statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
Which amongst the following is a commonly used method for determining soil moisture constant under laboratory conditions? (JRF AGRO-2020)
- Tensiometer
- Neutron probe
- Gypsum block
- Pressure plate membrane apparatus
Given below are two statements: Statement I: If the ozone concentration decreases in the atmosphere, more UV radiation will reach the earth’s surface. Statement II: The adverse effect of 1°C in temperature can be compensated by increasing CO2 concentration up to 600 ppm. In light of the above statements, choose the most appropriate answer from the options given below. (JRF AGRO-2020)
- Both statement I and Statement II are true
- Both statement I and statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
CAM plants are adapted to which type of environment? (JRF AGRO-2020)
- Humid
- Perhumid
- Arid
- Monsoon
Parthenium Awareness Week in India during the month of August each year is coordinated/organized by which directorate/institute of ICAR? (JRF AGRO-2020)
- ICAR-DWR, Jabalpur
- ICAR-IARI, New Delhi
- ICAR-CSSRI, Karnal
- ICAR-IIFSR, Modipuram
Determine the volume of HCl required to prepare 0.6 HCl solution (Given: Specific gravity of HCl = 1.18 g/ml; Purity percentage = 35%) (JRF AGRO-2020)
- 6.50 ml
- 53.03 ml
- 73.83 ml
- 65.10 ml
Which of the following weeds has a cup-shaped corolla? (JRF AGRO-2020)
- Avena ludoviciana
- Convolvulus arvensis
- Chenopodium album
- Cyprus rotundus
Which of the following irrigation methods is most suitable for the wheat crop? (JRF AGRO-2020)
- Sprinkler
- Drip
- Bubbler
- Drumkit
Awned varieties give more yield under drought situations as compared to awnless varieties and the contribution of awns in photosynthesis to grain is _____ (JRF AGRO-2020)
- 0.05
- 0.1
- 0.12
- 0.15
Given below are two statements: Statement I: Single superphosphate; double superphosphate are monocalcium phosphates. Statement II: Monocalcium phosphates are water-soluble and triple superphosphate are monocalcium phosphates. In light of the above statements, choose the most appropriate answer from the options given below. (JRF AGRO-2020)
- Both Statement I and Statement II are true
- Both Statement I and Statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
Which of the following is not a zymogen? (JRF AGRO-2020)
- Pepsinogen
- Trypsinogen
- Procarboxypeptidase
- Pyrrolidine
The NAVSTAR Global Positioning System is maintained by - (JRF AGRO-2020)
- Japan Space Agency
- Indian Space Research Organization
- USA Department of Defence
- European Space Agency
Statement I: Nutrients that are important in energy storage reactions are often present in plant tissues. Statement II: Some virus-induced plant diseases may produce symptoms similar to those of nutrient deficiencies. (JRF AGRO-2020)
- Both statement I and Statement II are true
- Both statement I and statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
First operational Indian Remote Sensing satellite IRS-1A was launched in the year (JRF AGRO-2020)
- 1988
- 1989
- 1990
- 1991
Arrange the sequence of steps involved in the procedure for the construction of ANOVA in Latin Square Design Steps: A. Arrange the raw data according to their row and column designation with corresponding treatments specified for each observation. B. Outline C. Compute F Value D. Compute DF For each source of variation, CF and the various sum of squares and mss E. Compute CV (JRF AGRO-2020)
- A-B-D-C-E
- A-D-B-C-E
- B-A-D-E-C
- A-B-C-D-E
How many stereoisomers does a ketopentose have? (JRF AGRO-2020)
- 4
- 6
- 8
- 10
Statement I: A heat unit is the departure from the mean daily temperature below the maximum temperature. Statement II: Q10 is the ratio of the rate of a process at a certain temperature to that at a temperature 10°C lower. (JRF AGRO-2020)
- Both statement I and Statement II are true
- Both statement I and statement II are false
- Statement I is correct but Statement II is false
- Statement I is incorrect but Statement II is true
Which of the following indicates a situation of hidden hunger in plants? (JRF AGRO-2020)
- Plant expresses nutrient deficiency symptoms when a nutrient is deficient
- Plant register severe yield reduction without expressing deficiency symptoms
- Plant nutrient is in sufficient quantity but seems to be deficient
- Plant is unable to express symptoms due to other elements
What amount of Urea, SSP, and MOP is required for application in the wheat crop at the rate of 120, 60, 30 kg N, P₂O₅, and K₂O ha⁻¹? (JRF AGRO-2020)
- 261:400 and 50 kg Urea, SSP and MOP
- 130:200 and 50 kg Urea, SSP and MOP
- 261:200 and 25 kg Urea, SSP and MOP
- 261:100 and 25 kg Urea, SSP and MOP
Calculate the water conveyance efficiency if water delivered to the farm is 84 mm and water diverted from the source is 140 mm. (JRF AGRO-2020)
- 0.5
- 0.6
- 0.7
- 0.8
Branching and pod formation are the most critical stage for irrigation in... A. Cereal crops B. Pulse crops C. Pulses and Forage Crops D. Medicinal crops E. Aromatic plants Choose the correct answer from the options given below: (JRF AGRO-2020)
- B only
- B & C only
- A & D only
- D & E only
The most commonly used method of herbicide application in India is. (JRF AGRO-2020)
- Spraying
- Sand application
- Cut and stump
- Band placement
Calculate the plant population of maize in a 6000 m² area, if it is sown at a spacing of 60 cm x 25 cm (JRF AGRO-2020)
- 40,000 plants
- 50,000 plants
- 60,000 plants
- 10,0000 plants
In irrigated salt-affected soils under a raised bed planting system, where should the seedlings be planted? (JRF AGRO-2020)
- At the top of the bed
- At mid-slope of the bed
- At the center of the furrow
- Seedlings can't be transplanted
The mode of herbicide action wherein the weed plants are bleached white is caused by which of the following herbicides? (JRF AGRO-2020)
- Atrazine
- Clodinafop propargyl
- Pendimethalin
- Tembotrione