agronomy Mcqs
301. Air contains___________________?
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A. 50% nitrogen

B. None of the above

C. 70% nitrogen

D. 78% nitrogen
302. The deficient level of N(%) in plants suggested by various workers is_________________?
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A. 10%

B.

C. <5%

D. <2%

303. Progeny of nucleus seed is called__________________?
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A. Breeder seed

B. Registered seed

C. Certified seed

D. Foundation seed

304. When one set of vegetation follows the oilier set of vegetation with passage of time is known as________________?
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A. Linear planting

B. Biodiversity

C. Retrogression

D. Succession
305. A warm summer and pronounced winter is called________________?
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A. Temperature

B. Arid

C. None of the above

D. Tropical

306. Oka (1975) has suggested that me population size suitable for maintenance and seed production of a commercial crop of a self pollinated species should be________________?
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A. 300 plants

B. 400 plants

C. 100 plants

D. 200 plants

307. Abnormal seeding growth in rice may be due to_________________?
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A. Endogenous inhibitors

B. Al the above

C. Lack of integrity in seed cells

D. Intrinsic Mechanism

308. Cultivation of same crop year after year is called________________?
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A. Double, cropping

B. Single cropping

C. Monocropping

D. All the above