Horticulture MCQ Question and Answer | Agriculture MCQ Question

Truck gardening is an extensive method of vegetable cultivation.
Truck gardening is the method of growing special vegetable crops in relatively larger quantities for distant markets by employing extensive methods. In this method of gardening, in general, a more extensive and less intensive method of cultivation than market gardening is followed.
Such farms are located far away from the centre of consumption preferably by the side of rail routes or metallic roads, which makes it easy to be transported.

Orange is the fruit that is most suited for the preparation of marmalade.
Marmalade is a fruit preserve made from the juice and peel of citrus fruits boiled with sugar and water. The well-known version is made from bitter orange.
It is also made from lemons, limes, grapefruits, mandarins, sweet oranges, bergamots and other citrus fruits or a combination.

Dwarfing rootstock in mango is Totapuri red small.
Dwarfing rootstocks produce the smallest trees and range from 6 feet tall to 12 to 14 feet tall.
Mango is commonly propagated with unselected seedling rootstocks, which might be responsible for the variation in the performance of trees of the same clone in the orchard. The investigations were carried out with 31 different rootstocks comprising of own-rooted varieties-Dashehari, Langra, Chausa, Totapari Red Small, Neelum, Bombay Green, and the seedlings raised from open-pollinated seeds of the above varieties.

Copper sulphate is sprayed in roses for Defoliation.
Defoliation is to deprive leaves especially prematurely by the attack of black spot fungus in roses. Thus copper sulphate antifungal is sprayed on the infected plants.
The effect of such a copper sulphate fungicide is preventing fungal infections on healthy plant tissue or the reduction of active fungal infections that can disease or destroy the plant.

The allopolyploid variety reported in mango is Vellai kolamban.
The tree of this variety is large and evergreen growing up to 45 m in height and 120 cm in bole diameter. The canopy is umbrella-shaped and spreading. The seeds are sources of starch and edible fat. Young leaves are cooked as a vegetable.
An allopolyploid is an individual having two or more complete sets of chromosomes derived from different species.

The monoembryonic variety of lemon is Meyer. Monoembryony is the emergence of one and only one seedling from a seed.
Meyer lemon is a hybrid citrus fruit native to China. It is a cross between a citron and a mandarin/pomelo hybrid.
The fruit is rounder than a true lemon, deep yellow with a slight orange tint when ripe and has a sweeter, less acidic flavour. The lemons contain a highly acidic pH of between 2 - 3. This acidity level allows for these lemons to be used as antibacterial and antiseptic cleaners.

Cashewnut is the fruit among the given options that belongs to the family Anacardiaceae.
The Anacardiaceae, commonly known as the cashew family or sumac family, is a family of flowering plants, including about 83 genera with about 860 known species.
Members of the Anacardiaceae bear fruits that are drupes and in some cases produce urushiol, an irritant.

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.

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.

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.