Horticulture MCQ Question and Answer | Agriculture MCQ Question

Canna is also known as an Indian shot.
Canna indica, commonly known as Indian shot, African arrowroot, edible canna, purple arrowroot, or Sierra Leone arrowroot, is a plant species in the family Cannaceae. It is native to much of South America, Central America, the West Indies and Mexico.
Canna indica is a perennial growing to between 0.5 and 2.5 metres, depending on the variety. It is hardy to zone 10 and is frost-tender. The flowers are hermaphrodite.
It can be used for the treatment of industrial wastewater through constructed wetlands. It is effective for the removal of high organic load, colour, and chlorinated organic compounds from paper mill wastewater.

Cytokinin is the plant hormone that prevents the mechanism of apical dominance in plants.
Cytokinins promote cell division and increase cell expansion during the proliferation and expansion stages of leaf cell development, respectively. During leaf senescence, cytokinins reduce sugar accumulation, increase chlorophyll synthesis, and prolong the leaf photosynthetic period.

CNSL is extracted from cashew nuts.
Cashew Nut Shell Liquid (CNSL) is a versatile by-product of the cashew industry. The nut has a shell of about $$\frac{1}{8}$$ inch thickness inside which is a soft honeycomb structure containing a dark reddish brown viscous liquid.
Natural CNSL is obtained by the utilization of some solvent extraction technique. It is cheaper, and renewable and is successfully employed to manufacture a variety of useful Phenolic Resin to replace synthetic Phenol in many of its applications with equivalent or better results.

Acute Magnesium deficiency is seen when the ratio is lower than 0.2.
Magnesium deficiency is a condition in which the amount of magnesium in the blood is lower than normal. The medical name of this condition is hypomagnesemia.
Magnesium deficiency in plants is common where the soil is not rich in organic matter or is very light. Heavy rains can cause a deficiency to occur by leaching magnesium out of sandy or acidic soil.

Weikang-a processed product is prepared from sweet potato.

Maximum fruit set in brinjal is seen in long style.
Brinjal is known to produce four types of flowers viz., long, medium, short, and pseudo-short-styled flowers with polymorphic ovaries. The number of flowers with medium and short styles is lower (10 - 15% and 22 - 30%, respectively). The highest fruit set was observed in the long-styled flowers (82.9 and 86.5%) followed by medium-styled flowers (78.2 and 77.2%).

Much hoeing is not advisable in carrots as the smell of the leaves attracts carrot flies.
Hoeing is the process in which entire surface soil is dug to a shallow depth with the help of hoes manually or mechanically, weeds are uprooted and removed.
Hoeing will attract carrot flies and they will lay eggs in the disturbed soil/cracked fields. This insect is a pest of gardens and farms, and mainly affects the crop of carrots, but can also attack parsnips, parsley and celery.

To get desired plant population of the french bean, the seed rate will be 85 - 95 (kg/ha).
Seed rate is the quantity of seed of a crop that is required to sow a unit area of land for optimum crop production. To maintain optimum plant population in the field for higher yield harvest and also to prevent seed wastage from excess sowing such reduces the initial cost of production.
French bean is an herbaceous annual plant grown worldwide for its edible dry seeds or unripe fruit. The common bean is high in starch, protein, and dietary fiber, and is an excellent source of iron, potassium, selenium, thiamine, vitamin B6 and folate.

Segmental allopolyploidy is found in potatoes.
Segmental allopolyploidy is an intermediate point between autopolyploidy and allopolyploidy. These are both recombinations within subgenomes (disomic inheritance) and between subgenomes (tetrasomic inheritance) that occur during meiosis.
The effects of autopolyploidization at morphological, physiological and molecular levels have been explored and no evident phenotypic superiority of polyploid lines concerning the parental diploid lines has been found. There were DNA methylation changes between diploids and polyploids, indicating that polyploidization alters the epigenetic patterns in potatoes.