Agronomy - Study Mode

[#841] Oryza sativa is a diploid species having chromosomes
Correct Answer

(A) 24

Explanation

Solution: Oryza sativa is the scientific name of Asian rice and is a diploid species with two sets of 12 chromosomes.
The genome of rice is composed of 24 chromosomes and has a total length of 430 megabases.

[#842] In which of the following, composite and synthetic cultivars are used
Correct Answer

(C) Maize

Explanation

Solution: A composite cultivar is a variety that is developed by mixing the seeds of various phenotypically outstanding lines possessing similarities for different characteristics like height, seed size, colour and maturity. A synthetic variety is developed by intercrossing several genotypes of known superior combining ability. In maize cultivation, both composite and synthetic cultivars are used.

[#843] Acid equivalent of urea is
Correct Answer

(D) 80

Explanation

Solution: The acid equivalent is that portion of a formulation that theoretically could be converted back to the corresponding parent acid. Concerning fertilizer, it can be defined as the acidity developed by a fertilizer when applied to soils, measured in terms of calcium carbonate required for its neutralization. The acid equivalent of urea is 80.

[#844] The maximum area in India is under which of the following crops?
Correct Answer

(C) Paddy

Explanation

Solution: Paddy fields occupy the maximum area in India of about a 45 million hectares of total agricultural land as of the end of the fiscal year 2021. Rice is the principal crop of our country. West Bengal is the largest producer of rice in our country and occupies more than 50% of its arable land for rice cultivation.

[#845] The main crop of potato is planted from
Correct Answer

(B) 15 th October to 25 th October

Explanation

Solution: Potato is the starchy tuber of the family Solanaceae. It is the herbaceous perennial and is mostly grown as a rainfed crop. The main crop of potato is sown in the 3 rd week of October i.e. from 15 th October to 25 th October. While in the plains the spring crop of potato is grown and sown in January.