Horticulture MCQ Question and Answer | Agriculture MCQ Question

Sodium benzoate is added for the preservation of fruit juice in the concentration of 0.06 - 0.10%.
Sodium benzoate and vitamin C can occur together in beverages such as fruit juice or soda, where these substances have been added to prevent spoilage and inhibit the growth of bacteria, moulds and yeast.

The upper stem of a banana is called Pseudostem.
The pseudostem is the part of the banana plant that looks like a trunk. It is formed by tightly packed overlapping leaf sheaths.
The pseudostem is very fleshy and consists mostly of water, it is quite sturdy and can support a bunch that weighs 50 kg or more.

French Breakfast, Pusa Chetki, Arka Nishant and Bombay Red are the varieties of Radish.
The radish is an edible root vegetable of the family Brassicaceae that was domesticated in Asia. As these are easy to grow and quick to harvest, radishes are often planted by novice gardeners.
Pusa Chetki is developed by IARI, New Delhi through selection from the germplasm of Denmark.

Arka Pink star is a variety of Chrysanthemum. It is the flowering plant of the genus chrysanthemum in the family Asteraceae.
Flowers are semi-double with pink colour, yield 135.26 flowers/plant.
It is a dwarf with an early flowering character.

Rosette formation is due to the deficiency of Zinc.
A rosette formation characterized many small papery pointed tip leaves emerging from a reduced internodal distance.
The other zinc deficiency symptoms are uniformly distributed interveinal chlorotic spots all along both sides of leaf margins, marginally small leaves with interveinal chlorotic spots and sharp pointed tip leaves with interveinal chlorosis with marginally reduced leaf size.

Fire blight of pear is caused by Bacteria.
Fire blight is a common and very destructive bacterial disease of apples and pears. The disease is caused by the bacterium Erwinia amylovora, which can infect and cause severe damage to many plants.
The disease can kill blossoms, fruit, shoots, twigs, branches and entire trees.

Harvesting of latex from opium capsules is called Lancing.
The lancing operation is performed by skilled labor (an average of 6 persons to a plot), usually on bright sunny days between noon and 4 p.m. The hottest part of the day is chosen, since the pellicle is said to form on the surface of the freshly exuded latex due to the hot sun, resulting in a greater degree of evaporation and quicker thickening. This also helps prevent the latex from falling off the capsule. The lancing operation is started at the edge of the field and the person works backward to avoid contact with the exuding latex.

Auxanometer is the combination of two words i.e. ‘Auxain’ means to grow and ‘metron’ means to measure. Thus an auxanometer is an apparatus for measuring the increase of growth in plants.
The "rate of growth" is a derived measurement obtained by dividing the length of growth measured by the auxanometer, by the time said measurement took. It is also called an arc indicator.

Potassium metabisulphite is also known as potassium pyrosulphite, it is a white crystalline powder with the chemical formula K₂S₂O₅.
It can be prepared by treating a solution of potassium hydroxide with sulphur dioxide.
It is mainly used as an antioxidant or chemical sterilant, a food additive

The richest source of mineral Selenium is Brazil nuts.
Protein foods from animals are generally good sources of selenium. Seafood, organ meats, Brazil nuts. Brazil nuts are the foods highest in selenium although Americans obtain most of their selenium from everyday staples, like bread, cereals, poultry, red meat and eggs.