agronomy MCQs – Page 10

Practise focused agronomy questions with marked answers for exam preparation and subject revision.

agronomy Mcqs
181. In 1992-93 the greatest decrease in the production of cotton was due to attack of_____________?
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A. Spotted boll worm

B. American boll worm

C. Aphids

D. CLCV
182. A gas produced by anaerobic decomposition of organic compounds is called as_________________?
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A. CO<sub>2</sub>

B. Ethane

C. Ammonia

D. Methane
183. The crop which are cultivated for grain purposes are called_________________?
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A. Fodder crops

B. Cereal crops

C. Fiber crops

D. Leguminous crops

184. The leguminous plants are important in agriculture because_________________?
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A. Help in nitrogen economy of nature

B. Six crops are harvested in a year

C. They are disease resistant

D. They need very little water to grow

185. The total dry matter produced by a plant as a result of photosynthesis is called_________________?
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A. Biological yield

B. Crop growth

C. Harvest index

D. Dry matter

186. The depth of water required by crops during the base period is called_____________________?
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A. Duty of water

B. Frequency of water

C. Delta of water

D. Acre inch

187. The systematic arrangement of soil in to groups or categories is called_________________?
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A. Classification

B. Perennials

C. Annuals

D. Ranking

188. CLCV stands for__________________?
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A. cotton leaf curl virus

B. Cotton leaf cover virus

C. cotton leaf cotton virus

D. cotton leaf complete virus

189. The K is predominantly in______________?
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A. All the above

B. Straw

C. Leaves

D. Grain

190. Hitting the seed with force against a hard surface to break seed dormancy is called_______________?
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A. Stratification

B. Impaction

C. Scarification

D. Abrasion

191. The contact herbicides are less effective to_________________?
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A. Perenial plants

B. Broad leaved weeds

C. All the above

D. Seasonal plants

192. The available form of nitrogen for plants is_________________?
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A. NO<sub>3</sub>

B. NH<sub>4</sub>

C. Both a and b

D. non of these

193. Excess of nitrogen to plants causes_________________?
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A. Delay in ripening

B. Delay in germination

C. All the above

D. Delay in growth

194. Main reason behind the shedding of flower in cotton is__________________?
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A. Cloudy day

B. High temperature

C. Low temperature

D. Humidity

195. Dwarf varieties of wheat are more resistance to_______________?
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A. Insect pest

B. Lodging

C. Viruses

D. Disease

196. Conducting experiments in glasses is called________________?
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A. In-sin

B. Invivo

C. Invitro

D. In-ova

197. The amount of water required to rise a crop to matunty with in a given period of time is called________________?
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A. Water balance

B. Crop Water requirement

C. Water depletion

D. Water frequency

198. The value of regression and correlation is the same when the correlation between two variables is_________________?
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A. Imperfect

B. Negative

C. Perfect

D. Positive

199. A method of control of pests in which natural predators and parasites are used without causing serious adverse environmental side effects is called_________________?
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A. Chemical control

B. Allelopathy

C. IPM

D. Insect control

200. Allelopathy is an important component in the development of future integrated strategies for____________?
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A. non of these

B. Soil management

C. Weed management

D. Water management