Horticulture MCQ Question and Answer | Agriculture MCQ Question

The uniform flowering in pineapple can be induced by the application of 25 ppm Ethephon + 2% urea. Ethephonis the active ingredient in etherel.
Ethephon at a concentration as low as 25 ppm in combination with urea (2%) was able to induce more than 90% flowering after 50 days of treatment. The addition of either urea or calcium carbonate increased the effectiveness of ethephon for the induction of flowering.

The in-situ method of grafting in mango is Inarching.

Inarching is a technique where a young seedling or rootstock is used as a support for the scion (the part of the plant being grafted). The scion and rootstock are joined together at the base, typically in the nursery or field, and both plants are allowed to grow together until they form a stable union. This method is commonly used for mango grafting, especially when the desired variety of mango is grafted onto a rootstock that is resistant to diseases or pests.

Option B: Stone Grafting This option is incorrect. Stone grafting involves the use of the seed or stone from a fruit to grow a new plant, but it is not an in-situ grafting method used in mango.

Option C: Epicotyl Grafting This option is incorrect. Epicotyl grafting is a method where the graft is made on the epicotyl (the portion of the stem above the cotyledons), and while it may be used in some plants, it is not typically used in mango.

Option D: Soft Wood Grafting This option is incorrect. Softwood grafting involves grafting onto young, flexible shoots, but this is not considered an in-situ method for mango grafting.

Therefore, the correct answer is Option A: Inarching, as this is the appropriate in-situ grafting method for mango cultivation.

Greece is the country that has the highest per capita intake of vegetables.
Vegetable consumption per capita reached 228 kg in 2013 in Greece, according to Faostat. This is 1.98% less than in the previous year.
Greece seems to have one of the highest consumption levels of healthy foods, such as vegetables, cereals and fruits.
The country also occupies seventh place out of the 28 countries in the consumption of cereals. Additionally, Greece has the lowest consumption of sugar and sweeteners.

Golden Acre, Pride of India, and Express are the improved varieties of cabbage.
Golden acre is the early growing variety with small round heads, colour of the leaves is light green from the outside and dark green from the inside. Individual heads weighing 1 - 1.5 kg, harvested within 60 - 65 days after transplanting, the average yield is 20 - 24 t/ha.
Pride of India is also an early growing variety of medium-large head weighing 1 - 1.5 kg, harvested within 70 - 80 days after transplanting, the average yield is 20 - 28 t/ha.
Cabbage Express is an early variety of pointy cabbage. It is suitable to eat fresh, for example in salads. It makes 1 - 1.5 kg heavy heads.

Pusa lal is a variety of sweet potato whereas Pusa Red is a variety of Onion.
Pusa lal is a selection from a Japanese variety (Norin). It is a purplish red-skinned and white-fleshed variety that produces a high proportion of marketable tubers. This variety is very popular in Delhi, Punjab, Rajasthan, U.P. and Maharashtra.
Pusa Red is a variety of onions and in this type, the bulb is medium in size, purple-red, and flattish round, each bulb weighs 70 - 90 g, has less bolting and with poor pungency. The variety requires short to intermediate day length. It matures in 123 - 140 days after transplanting. It is commonly grown in India.

The art of developing plants by pruning or training them into different shapes is called Topiary.
It is the practice or art of training, cutting and trimming trees or shrubs into odd or ornamental shapes. It can be any shape like animals, birds, arches, etc.
The plant should be amenable to repeated pruning and also flexible with more vegetative growth.

The non-preference insect-resistant mechanism is known as Antixenosis.
Antixenosis operates by disrupting normal arthropod behaviour, whereas antibiosis adversely affects a pest's physiological processes, thereby impairing arthropod survival, growth, development and behaviour.
It affects the behaviour of an insect pest and is usually expressed as non-preference of the insect for a resistant plant variety as compared with a susceptible crop variety.

International Center for Tropical Agriculture is situated in Colombia.
It is an international research and development organization dedicated to reducing poverty and hunger while protecting natural resources in developing countries. It is based in Palmira, Colombia, where it employs over 300 scientists. CIAT is one of the 15 specialized research centres.
It aims to "deliver research-based solutions that harness agricultural biodiversity and sustainably transform food systems to improve people's lives".

The term “auxin” is derived from the Greek “auxein” which means “to grow,” and was proposed originally by Kogl and Haagen-Smit.
Auxins play a cardinal role in the coordination of many growths and behavioral processes in plant life cycles and are essential for plant body development. The Dutch biologist Frits Warmolt Went first described auxins and their role in plant growth in the 1920s.

Ber is the most suitable among the following options to be grown in arid zones of India.
The arid zone of India covers about 12% of the country's geographical area. A total of 32 million ha is hot arid and is spread over parts of Rajasthan (61%), Gujarat (20%), Andhra Pradesh and Karnataka (10%) and Punjab and Haryana (9%).
India is the largest producer of ber. In Punjab, ber has been planted on 2500 hectares, with an annual production of 42847 MT.