Horticulture - Study Mode

[#771] Most commonly used chemical agent for doubling of plant chromosome is
Correct Answer

(B) Colchicine

Explanation

Solution: The most commonly used chemical agent for doubling plant chromosomes is Colchicine . It disrupts mitosis by inhibiting the formation of spindle fibers and disturbing normal polar chromosomal migration, resulting in chromosome doubling. Chromosome doubling occurs as a spontaneous process of mitotic cell division without cytokinesis.

[#772] Base of cut flowers is subjected to hot water treatment in
Correct Answer

(A) Rose

Explanation

Solution: The base of cut flowers is subjected to hot water treatment in Rose . Rose is an ornamental plant, which constitutes one of the leading cut flowers in the world. The vase life of cut Rosa hybrida L. flowers is truly short. Treatment of cut flowers with water at the temperature of 52°C for 15 min induced the highest water absorption, petal's anthocyanin, leaf's chlorophyll and the lowest ethylene production.
The use of warm water (52°C) for 15 min extended the vase life and most traits of the vase life of cut Rosa hybrida L. flowers.

[#773] In north India pruning in grape is done in the month of
Correct Answer

(C) January

Explanation

Solution: In north India pruning in grapes is done in January . Pruning is the removal of canes in the grape vines. All the canes are pruned back by retaining one or two basal buds. This is called back pruning. The shoots from these sprouted buds are allowed to grow and the food material is stored in it. Hence, it is also called foundation pruning. The purpose of pruning is to obtain maximum yields of high-quality grapes and to allow adequate vegetative growth for the following season.

[#774] Bharat, the first F 1 hybrid of capsicum in India was released by
Correct Answer

(B) IAHS

Explanation

Solution: Bharat, the first F 1 hybrid of capsicum in India was released by IAHS, Bangalore in 1973. Plants are vigorous, fruit dark green, 4 lobed yields 20 - 25 t/ha. It is resistant to Tobacco Mosaic Virus. Harvest of fruits starts from 90 - 100 days. It requires well-drained red loamy soil.

[#775] Kisan Call Center answering farmers queries during the time
Correct Answer

(D) 6 AM - 10 PM

Explanation

Solution: Kisan Call Center (KCC) is an initiative by the Indian government to provide agricultural information and expert advice to farmers across the country. The primary objective of KCC is to respond to issues raised by farmers in their local languages in real time. These centers operate from 6 AM to 10 PM every day , including holidays, ensuring that farmers can get timely help when they need it most. Expert agricultural scientists and trained professionals are available during these hours to answer queries related to crops, fertilizers, pest control, weather, and more. Therefore, the correct answer is 6 AM - 10 PM.