Most Important Question For Jrf, Bhu, Pre-Pg All Agriexams MCQ

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Q.Repetitive growing Of sole crop in same field is known as

Relay cropping
Mono cropping
Multiple cropping
Mix cropping

Ans
Mono cropping
Detail
Monocropping is the agricultural practice of growing a single crop year after year on the same land, in the absence of rotation through other crops or growing multiple crops on the same land polyculture. Corn, soybeans, and wheat are three common crops often grown using monocropping techniques.

Q. Under dry land condition most preferred herbicide for maize is ?

Propanil
Fluchloralin
Butachlor
Atrazine

Ans
Atrazine
Detail
Atrazine is a herbicide of the triazine class. It is used to prevent pre- and postemergence broadleaf weeds in crops such as maize (corn) and sugarcane

Q.Soils having 200 kg available K20/ha will be — fertile soil for K

High
Low
Medium
None Of these

Ans
Medium
Detail

Q. Field trials Of GM Mustard are complete. If approved, it become the ………….. genetically modified food crop to be grown commercially in the country?

First
Second
Third
Fourth

Ans
First

Q. Rocks formed from molten magma solidification at earth surface is rock

Sedimentary
Metamorphic
Igneous
None of these

Ans
Igneous
Detail
Igneous rocks (from the Greek word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface

Q. Apatite is rich source of

Ans
P
Detail
Apatite is the name of a group of phosphate minerals with similar chemical compositions and physical properties.

Q.Nitrification in the soil take place by?

Reduction process
Oxidation process
Biological oxidation
Both a & b

Ans
Biological oxidation
Detail
Nitrification is the biological oxidation of ammonia to nitrite followed by the oxidation of the nitrite to nitrate. The transformation of ammonia to nitrite is usually the rate limiting step of nitrification. Nitrification is an important step in the nitrogen cycle in soil.

Q. Bio-fortified variety Of Cauliflower is

Pusa Sharda
Pusa Betakeshari
Pusa Kekti
Pusa Kiran

Ans
Pusa Betakeshari
Detail
Biofortification can be defined as a process to increase the bioavailability and the concentration of nutrients in crops through both conventional plant breeding (White and Broadley, 2005) and recombinant DNA technology (genetic engineering) (Zimmermann and Hurrell, 2002).

Q. Which sugarcane hybrid clone variety was launched for the sub-tropical climate?

Ans
205

Q. Pedoturbation is the process of

Mixing Of the soil
Mixing of FYM in soil
Mixing Of fertilizer in soil
Mixing of pesticide

Ans
Mixing Of the soil
Detail
Pedoturbation involves mixing between soil horizons, and is an important factor in soil formation. Pedoturbation includes churning clays, cryoturbation, and bioturbation.

Q. Which GM Mustard variety is developed by DU ?

DMH-12 or Dhara Mustard Hybrid-12
DMH 13 or Dhara Mustard Hybrid- 13
DMH-14 or Dhara Mustard Hybrid-14
DMH-11 or Dhara Mustard Hybrid-11

Ans
DMH-11 or Dhara Mustard Hybrid-11
Detail
Dhara Mustard Hybrid-11, otherwise known as DMH – 11, is a genetically modified hybrid variety of the mustard species Brassica juncea. It was developed by Professor Deepak Pental from the University of Delhi, with the aim of reducing India’s demand for edible oil imports.

Q.Soil order having largest area in India is

Alfisols
Vertisols
Inceptisols
Entisols

Ans
Inceptisols
Detail
Inceptisols are a soil order in USDA soil taxonomy. They form quickly through alteration of parent material. They are more developed than Entisols. They have no accumulation of clays, iron oxide, aluminium oxide or organic matter.

Q. Which of the following rock is volcanic in native ?

Basalt
Diorite
Monzonite
Gabbro

Ans
Basalt
Detail
Basalt is a dark-colored, fine-grained, igneous rock composed mainly of plagioclase and pyroxene minerals.

Q.Mycorrhiza-infectad plants show better ability of absorption of the nutreients, especially ?

Iron
Maaganese
Phosphorus
Potassium

Ans
Phosphorus
Detail
mycorrhizas is a symbiotic association between a fungus and a plant. The term mycorrhiza refers to the role of the fungus in the plant’s rhizosphere, its root system. Mycorrhizae play important roles in plant nutrition, soil biology and soil chemistry.

Q.Nutrient index between 1.5 and 2.5 is categorized as ?

High
Low
Medium
None Of these

Ans
Medium
Detail
Soil nutrient index (NI)
Nutrient index value of <1.5 is taken as low, values between 1.5 –2.5 indicates medium and >2.5 as higher fertility status of the given area.

Q.Nitrogen is absorbed by the plants in the from ?

only as NO₃⁻
Only as NH₄⁺
Both a & b
None Of the above

Ans
Both a & b
Detail
Plants absorb nitrogen from the soil in the form of nitrate (NO₃⁻) and ammonium (NH₄⁺). In aerobic soils where nitrification can occur, nitrate is usually the predominant form of available nitrogen that is absorbed. … Ammonium ions are absorbed by the plant via ammonia transporters.

Q. The B horizon is generally absent in soils.

Black soils
Red soils
Desert soils
Brown hill soils

Ans
Black soils
Detail
The B horizon contains weathered, rough mineral soil with small deposits of humus.

Q.Most salt tolerant grass is

Kamal grass
Rhodes grass
Para grass
Bermuda grass

Ans
Kamal grass
Detail

Q. Most resistant mineral present in soil is ?

Mica
Quartz
Hornblende
None of above

Ans
Quartz
Detail
Quartz is a chemical compound consisting of one part silicon and two parts oxygen. It is silicon dioxide (SiO₂). It is the most abundant mineral found at Earth’s surface, and its unique properties make it one of the most useful natural substances. Rock crystal quartz: Transparent “rock crystal” quartz.

Q. For the first time, scientists have developed Which fabric from the flax plant?

Cotton
Nylon
Linen
Rayon

Ans
Linen
Detail
Linen is a textile made from the fibers of the flax plant. Linen is laborious to manufacture, but the fiber is very strong,

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