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Agronomy MCQ Question and Answer | Agriculture MCQ Question

Agronomy MCQ Question and Answer with easy explanations in Agriculture mcq. Agronomy MCQ section is suitable for aspirants preparing for IBPS- AFO (Agriculture Field Officer) Iffco, Kribhco, NFL, NSC, ICAR-JRF/SRF/ ARS, IARI, SADO, DDA,ADA,FCI,ASRB,B.Sc Agriculture and M.SC Agriculture. Page-6 section-1

Each section contains 100 MCQs on Agronomy .
51
On volume basis a sample of pure air on an average consists of . . . . . . . . carbon dioxide
Discuss
Answer & Solution
Answer: Option B
Solution:
Pure air i.e. atmosphere is composed of nitrogen - 78%, oxygen - 21%, carbondioxide - 0.033% and traces of some other gases like argon, helium, ozone, neon, etc.
52
Seed work board is required for
Discuss
Answer & Solution
Answer: Option D
Solution:
A seed workboard is required for the blending of seeds. This board of seed analyses the seed samples physically with maximum efficiency. One more board is the seed purity board also functions to check the purity of seeds in the laboratory.
53
Sugarbeet belong to the family
Discuss
Answer & Solution
Answer: Option A
Solution:
Sugarbeet (Beta vulgaris) is a species of flowering plant belonging to the family Amaranthaceae or Chenopodiaceae. It is an herbaceous plant with edible roots. Sugar beet juice contains high levels of sucrose and is second only to sugarcane as a major source of the world's sugar.
54
Cofactor for Urease enzyme
Discuss
Answer & Solution
Answer: Option C
Solution:
Most enzyme needs some elements as co-factor or activator to get themselves activated, likewise, urease enzyme also needs Nickel as a cofactor to start functioning. Urease is the enzyme that digests urea and hydrolyses it into simpler compounds.
55
Which one of the following is the characteristic of stripe rust of wheat
Discuss
Answer & Solution
Answer: Option B
Solution:
Stripe rust of wheat is one of the types of rust disease in wheat crops. It is also called wheat yellow rust. It can cause significant loss to crop yield and its quality. In this disease elongated lesions are present on the infected area which bears yellow-orange spores, that is why it is called yellow rust.
56
CO2 concentration in the atmosphere is about
Discuss
Answer & Solution
Answer: Option A
Solution:
The concentration of carbon dioxide in the earth's atmosphere is currently at nearly 400 - 500 parts per million (ppm). And because of the extreme rise in temperature because of global warming and pollution, the concentration of CO2 keeps on rising.
57
The average concentration of CO2 in the atmosphere is:
Discuss
Answer & Solution
Answer: Option D
Solution:
The concentration of carbon dioxide in the earth's atmosphere is currently 421 parts per million (ppm) in the May 2022. And because of the extreme rise in temperature because of global warming and pollution, the concentration of CO2 keeps on rising.
58
The relationship between two organisms where one organism benefits but, the other is neutral (there is no harm or benefit) is known as
Discuss
Answer & Solution
Answer: Option B
Solution:
The relationship between two organisms where one organism is benefitted while the other one is neutral neither benefitted nor harmed, that type of relationship is known as commensalism. While the mutual relationship where both the organism is benefitted is termed symbiosis.
59
Triple Response is associated with
Discuss
Answer & Solution
Answer: Option D
Solution:
The triple response is the condition in plants that is triggered by the use of ethylene. It causes plants to have short roots, fat shoots, and increased lateral root growth, morphologically changes can be defined as inhibited root elongation, enhanced radial swelling and shortening of the hypocotyl.
60
The major component of biogas generated from cow-dung is
Discuss
Answer & Solution
Answer: Option D
Solution:
Methane is the major constituent of biogas generated from cow dung. It contains approximately 75% of methane gas and 25% of carbon dioxide, some other gases like hydrogen, hydrogen sulphide, water vapour, nitrogen, oxygen and ammonia.