Horticulture MCQ Question and Answer | Agriculture MCQ Question

Non-cracking seedless variety of litchi is Swarna Roopa.
Swarna roopa is the outcome of the selection made at CHES, Ranchi from different collections of litchi cultivars. This is the first variety developed in India. It has attractive deep-pink fruit colour, small seed and high TSS/acid ratio.
Fruits are highly resistant to cracking. Fruits mature a week later than the late cultivar in China.

The diamond back moth is a serious pest of cauliflower.
Diamond back moth attacks only plants of the Cruciferae family. It can cause a yield loss of 80 to 90 percent.
The caterpillar's name comes from the diamond-shaped markings on the adult moth. They have distinctive white spots on their wings, due to which they look like diamonds. The caterpillar eats the lower surface of the leaves and damages them.

Lasoda (Cordia mixa) is a minor fruit of India that belongs to the family Boraginaceae.
Cordia myxa, the Assyrian plum, is a mid-sized, deciduous tree in the borage family (Boraginaceae), native to Asia. It produces small, edible fruit and is found in warmer areas across Africa and Asia.
It is a kind of a drupe (stone fruit), light pale to brown or even pink. The appearance tends to darken when ripening sets in.

The plantation crop originally introduced for soil conservation is the cashew nut.
Plantations are a type of commercial farming where a single crop of tea, coffee, sugarcane, cashew, rubber, banana, or cotton is grown. The produce may be processed on the farm itself or in nearby factories.
In the Cashew cultivation process, the cashew is generally planted on the wastelands and hence the availability of soil moisture is always low, hence, mulching is essential. Mulching with black polythene is beneficial to increase the growth and yield of cashew.

A very shallow-rooted (15 - 30 centimeter) crop is onion.
Shallow-rooted crops have main root systems in the top 1 to 2 feet of soil. Examples are cabbage, cauliflower, lettuce, celery, sweet corn, onion, white potato and radish.
Onion plants have fibrous roots. Fibrous roots arise from the base of the stem leaves rather than from the radicle. They are bushy roots formed by several thin, hairy and moderately branched roots. Onion root tips containing meristematic cells are used for microscopic study of mitosis cell division stages.

Salt-resistant tomato species is Solanum cheesmaniae.
A salt-tolerant plant that grows in soil or waters of high salinity, coming into contact with saline water through its roots or by salt sprays, such as in saline semi-deserts, mangrove swamps, marshes and sloughs and seashores.
Tomato is moderately tolerant to salinity by regulating water and ionic homeostasis according to Martinez-Rodriguez et al. High salinity adversely affects seed germination and inhibit growth and fruit development in tomato.
Solanum cheesmaniae, is one of two main species of wild tomatoes found on the Galápagos Islands. It is a robust, perennial, herbaceous plant that at first grows erect, later lying. It is often found in rocky coastal sites and has habits of growing on the shore or inland.

A disease having regular occurrence in a particular area is termed Endemic.
The word Endemic is used to describe a disease that is present at an approximately constant level within a society or country.
For an infection that relies on person-to-person transmission, to be endemic, each person who becomes infected with the disease must pass it on to one other person on average.

Self-incompatibility in cole crops is overcome by Bud Pollination, CO2 Treatment and NaCl spray.
Self-incompatibility is a widespread mechanism in flowering plants that prevents inbreeding and promotes outcrossing.
Bud Pollination is the most successful method in both the gametophytic and sporophytic systems. The most advantageous stage for the buds to overcome self-incompatibility is two to seven days before anthesis.
To maintain inbred lines of the crop plant, a method in that high CO₂ gas is treated to the pistils to overcome the self-incompatibility.
It had been shown that self-incompatibility could be overcome by NaCl in the self-incompatible Chinese cabbage.

The blue colour of flowers of Hydron macrophylla as opposed to the regular pink colour is associated with the presence of Aluminium (Al) element in soil.
Hydrangea macrophylla is a species of flowering plant in the family Hydrangeaceae, native to Japan. It is a deciduous shrub growing to 2 m tall by 2.5 m broad with large heads of pink or blue flowers in summer and autumn.
Colour variation in hydrangeas is due to the presence or absence of aluminum compounds in the flowers. If aluminum is present, the colour is blue. In general, more acidity makes hydrangeas turn blue, less acidity promotes pink. This is caused by a colour change of the flower pigments in the presence of aluminium ions which can be taken up into hyperaccumulating plants.

Sandy-loam is the soil type that is best for vegetable cultivation.
Sandy loam soil is ideal for gardening, growing crops and producing great-looking lawns, especially in areas that are high in clay content. It is considered to be ideal because of its ability to release nutrients freely to plants, retain water to feed plants and allow excess water to flow away quickly and easily.