Horticulture - Study Mode

[#721] Seed plot technique in potato was developed by . . . . . . . .
Correct Answer

(B) Dr. Puskarnath

Explanation

Solution: The seed plot technique in potatoes was developed by Dr. Puskarnath in 1967 . "Seed Plot Technique" i.e. raising the healthy seed crop during the low aphid population period available in northern plains. It is a technique of multiplication of disease-free (virus-free) seeds in the Northern plains of the country. The nucleus seed of the potato is produced from April to August when the aphid population is low in the hills.

[#722] The inception of ripening in grape is termed as
Correct Answer

(C) Verasion

Explanation

Solution: The inception of ripening in grape is termed Verasion . It is the onset of the ripening of the grapes. The official definition of veraison is "change of colour of the grape berries". The trigger of veraison is unknown but may signify the seed reaching maturity, an unlikely signal, however, because seedless berries also proceed through veraison.

[#723] Haploid plants have been produced by anther culture in tomato by
Correct Answer

(A) Greshof and Doy

Explanation

Solution: Haploid plants have been produced by anther culture in tomato by Greshof and Doy . Experimental induction of androgenesis from cultured anthers was first attempted in tomatoes by Gresshoff and Doy, in 1972 soon after the discovery of the process by Guha and Maheshwari (1964). Anther culture means plant regeneration from the haploid microspore cells with the aim of haploid and dihaploid plant production.

[#724] Fruit thinning growth regulator is
Correct Answer

(A) NAA

Explanation

Solution: The fruit thinning growth regulator is NAA. NAA (naphthalene acetic acid) is a synthetic auxin plant growth regulator that will effectively promote return bloom when used at the thinning stage in trees that are biennial bearing. It is widely used as an effective thinner in apple orchards. When applied shortly after fruit set, some fruit abscise leading to improved fruit size and quality.

[#725] In India, hydroponics was 1 st introduced at
Correct Answer

(B) Kalimpong

Explanation

Solution: In India, hydroponics was 1 st introduced at Kalimpong . The first work on soilless culture in India was started in 1946 at the Government of Bengal's Experimental Farm at Kalimpong. Hydroponics is a type of horticulture and a subset of hydroculture that involves growing plants, without soil, by using water-based mineral nutrient solutions in aqueous solvents. In 1929, William Frederick Gericke of the University of California at Berkeley began publicly promoting that the principles of solution culture are used for agriculture and He first termed this cultivation method "aquiculture".