Horticulture MCQ Question and Answer | Agriculture MCQ Question

Pusa snowball-1 is the variety of cauliflower, in which seed production is not possible on North Indian plains.
Cauliflower is relatively more sensitive to deficiency of boron and molybdenum, and it has a high requirement of magnesium, because of which late cauliflower varieties do not set seeds in Plains.
Pusa Snow ball-1 is the late variety of cauliflower, sowed in September end-mid October. Outer leaves are upright and inner leaves cover the curd initially. Curd is compact, medium-sized and snow white. Curd is ready for harvest about 100 days after transplanting. Curd yield is 90 quintals/acre.

The principle of preservation by pickling is based on Lactic acid fermentation.
Pickling is the process of preserving edible products in an acid solution, usually vinegar, or in salt solution (brine). In the latter case, the acid that does the preservative action (lactic acid mainly) is produced by fermentation.
Pickles are produced through the fermentation of fruits and vegetables in brine or in their juices that contain certain salt concentrations with Lactic Acid Bacteria. The process of pickling is also known as bringing and the resulting foods as pickles.

Cock's comb belongs to the botanical family Amaranthaceae.
Amaranthaceae is a family of flowering plants commonly known as the amaranth family, about its type genus Amaranthus. It includes the former goosefoot family Chenopodiaceae and contains about 165 genera and 2,040 species.
Cockscomb boasts brightly-colored blooms with a unique comb-like shape. The velvety, large flowers keep their colours even when dried, making them a perfect addition to wreaths or dried flower arrangements.

Seedless in Black Corianth grapes is due to Stimulative Parthenocarpy.
The stimulative type of parthenocarpy occurs when pollination occurs but fertilization doesn't. It occurs by the insertion of the ovipositor of a wasp into the ovary of a flower.
In the Black Corinth variety of grapes, pollination and fertilization take place but the embryo gets aborted subsequently resulting in seedlessness.

A perigynous ovary is seen in palak.
Perigynous flowers are the ones in which gynoecium stays in the centre and other parts of the flower are located on the rim of the thalamus almost at the same level. The ovary is said to be half inferior. Referring to a flower in which the sepals, petals, and stamens arise from the rim of a cuplike hypanthium surrounding the ovary.

In cryopreservation, seeds are immersed in liquid nitrogen at -196°C temperature.
Plant cryopreservation is a genetic resource conservation strategy that allows plant material, such as seeds, pollen, shoot tips or dormant buds to be stored indefinitely in liquid nitrogen. After thawing, these genetic resources can be regenerated into plants and used in the field.

Pusa Hybrid-1, a hybrid of all the above crops from the option like Pumpkin, Bottle gourd and Tomato and were released from IARI, New Delhi, India.
Pumpkin ‘Pusa Hybrid 1’ has been selected and tested in different agroclimatic conditions under the All India Coordinated Vegetable Improvement Project. It is the first hybrid of pumpkins available for commercial cultivation.
Pusa Hybrid-1 tomato is a hybrid that takes 120 to 130 days from transplanting to fruit ripening, it is highly tolerant to root-knot disease. This hybrid is suitable for western India. About 100 to 150 g of seeds are sufficient for raising seedlings for a hectare.

The most heavily pruned fruit plant is Ber.
The pruning is done to regulate the flowering and fruiting of the plants. To maintain an optimum balance between vegetative and reproductive growth of the trees. To ensure penetration of sunlight and air inside the canopy of the plants.
Pruning is done during the hot and dry season when the tree sheds leaves and enters into dormancy. In Tamil Nadu, the trees are pruned from January - April, in Maharashtra and Gujarat pruning must be completed by the April end and in Haryana by the May end.

The chemical name of Vitamin-K is Phylloquinone. Chemically, the vitamin K family comprises 2-methyl-1 and 4-naphthoquinone derivatives. Vitamin K includes two natural vitamers: vitamin K₁ (phylloquinone) and vitamin K₂ (menaquinone).
Vitamin K refers to structurally similar, fat-soluble vitamers found in foods and marketed as dietary supplements.
The human body requires vitamin K for post-synthesis modification of certain proteins that are required for blood coagulation or for controlling the binding of calcium in bones and other tissues.

The growth regulator used to reduce flower drops in chili is NAA.
Spraying of NAA (20 ppm) at 30 days after planting to get early flowering, increased number of flowers, fruit set, and reduced flower drop and fruit drop.
Spraying of NAA (50 ppm) at the beginning of flowering in chili was found to reduce flower drop as compared to control.