Horticulture - Study Mode

[#101] Which of the following acts as an anti-oxidant?
Correct Answer

(A) Selenium

Explanation

Solution: Selenium among the following acts as an antioxidant. As to their biological action mechanism selenium and its compounds are antioxidants. Selenium is an active immunomodulator, a much more potent anti-oxidant than vitamins E, C and A, beta-carotene, but much more toxic.

[#102] Manikara hexandra (Khirni) is used as root stock for
Correct Answer

(B) Sapota

Explanation

Solution: Manilkara hexandra (Khirni) is used as root stock for Sapota. A rootstock is part of a plant, often an underground part, from which new above-ground growth can be produced. Manilkara hexandra is a tree species in the tribe Sapoteae , in the family Sapotaceae . It is locally known as the Khirni tree in parts of Bangladesh and India. It is a slow-growing but fairly large evergreen species. It grows in tropical and temperate forests.

[#103] Pusa red is a variety of
Correct Answer

(D) Onion

Explanation

Solution: Pusa Red is a variety of Onion. Pusa Red is a variety of onions and in this type, the bulb is medium in size, purple-red and flattish round, each bulb weighs 70 - 90 g, has less bolting and with poor pungency. The variety requires short to intermediate day length. It matures in 123 - 140 days after transplanting. It is commonly grown in India.

[#104] The primary objective of green house cultivation of vegetables is
Correct Answer

(B) To get off season yield

Explanation

Solution: The primary objective of greenhouse cultivation of vegetables is to get off season yield. It maintains the yield by providing favourable growing conditions and protecting crops from un-favourable weather and various pests. They offer a suitable microclimate for plants and make possible growth and fruiting, which is not possible in open fields. This is why a greenhouse is also known as a "controlled environment greenhouse".

[#105] Which one of the following statements is not correct
Correct Answer

(D) Calcium carbide chemical is not used for artificial ripening in banana

Explanation

Solution: Out of the given options, the calcium carbide chemical not used for artificial ripening in a banana is wrong as it is used in the ripening of a banana. While all the other three statements are correct. Ethylene gas, acetylene gas liberated from calcium carbide and ethephon are some of the commercial ripening agents used successfully in the trade and they have been widely studied for their effectiveness in initiating and accelerating the ripening process and their effect on fruit quality and health-related issues.