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Agriculture Mcqs 7387 MCQs [All-Courses]

Agriculture MCQs cover fundamental and applied concepts related to farming, crop production, soil science, irrigation, fertilizers, plant breeding, pests, and agricultural economics. This topic is designed to strengthen conceptual understanding and problem-solving skills through objective questions. It is especially useful for competitive exams such as PPSC, FPSC, KPPSC, BPSC, NTS, OTS, and other testing services, helping candidates prepare with exam-oriented and up-to-date agricultural knowledge.

The transfer of energy from one trophic level to another is governed by the 2nd law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is:

A 25%

B 50%

C 10%

D 5%

Review Detailed Answer

Correct Answer: 10%

One of the major difficulties in the biological control of insect pests is that:

A The predator develops a preference to other diets and may itself become a pest

B They do not always survive when transferred to a new environment

C The method is less effective as compared to the use of insecticides

D The practical difficulty in introducing the predator to specific area

Review Detailed Answer

Correct Answer: The predator develops a preference to other diets and may itself become a pest

Niche of a species in an ecosystem refers to its:

A Place of occurrence

B Competitive ability

C Centre of origin

D Function at its place of occurrence

Review Detailed Answer

Correct Answer: Function at its place of occurrence

Energy transfer from one trophic level to other in a food chain is:

A 1%

B 2%

C 10%

D 20%

Review Detailed Answer

Correct Answer: 10%

Ecosystem receives nitrogen from outside through:

A Biological nitrogen fixation

B Electrification of nitrogen

C Industries

D All the above

Review Detailed Answer

Correct Answer: All the above

If we completely remove the decomposers from an ecosystem, its functioning will be adversely affected because:

A Herbivores will not receive solar energy

B Rate of decomposition of other component will be very high

C Mineral movement will be blocked

D Energy flow will be blocked

Review Detailed Answer

Correct Answer: Mineral movement will be blocked

Mark the incorrect statement with reference to carbon cycle:

A Lime rocks contribute to CO2 of water

B Atmospheric CO2 gets dissolved in water

C CO2 is returned by combustion of fuel

D 75% of total carbon lies in geological component

Review Detailed Answer

Correct Answer: 75% of total carbon lies in geological component

The sulphate rocks are formed in ocean by leaching of:

A FeS and Fe2S3

B Organic sulphates and -SH

C Soluble inorganic sulphates

D All of these

Review Detailed Answer

Correct Answer: Soluble inorganic sulphates

Hydrological cycle is under the control of:

A Grasslands

B Forests

C Planktons

D Epiphytes

Review Detailed Answer

Correct Answer: Forests

The maximum amount of CO2 fixed by green plants by way of photosynthesis in a year is:

A 9 x 1013 kg

B 8 x 1012 kg

C 9 x 1011 kg

D 8 x 1010 kg

Review Detailed Answer

Correct Answer: 9 x 1013 kg

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Agriculture Mcqs 7387 MCQs [All-Courses]

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All Topics 7387

The transfer of energy from one trophic level to another is governed by the 2nd law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is:

One of the major difficulties in the biological control of insect pests is that:

Niche of a species in an ecosystem refers to its:

Energy transfer from one trophic level to other in a food chain is:

Ecosystem receives nitrogen from outside through:

If we completely remove the decomposers from an ecosystem, its functioning will be adversely affected because:

Mark the incorrect statement with reference to carbon cycle:

The sulphate rocks are formed in ocean by leaching of:

Hydrological cycle is under the control of:

The maximum amount of CO2 fixed by green plants by way of photosynthesis in a year is: