Agronomy MCQ Question and Answer | Agriculture MCQ Question

A hybrid formed by crossing Wheat and Rye is known as Triticale. It is the combination of the words Triticum (Wheat) and Secale (Rye). It was first bred in laboratories of Scotland by A. S. Wilson in 1873. It is mostly grown for forage or fodder, but nowadays also used as breakfast cereals.

In agriculture, herbicides are often applied using various types of sprayers or dusters. When it comes to herbicide wastage through drift, the Ultra-low volume (ULV) sprayer is the most problematic.

• High volume sprayer: This type of sprayer typically produces larger droplets, which are less prone to drifting. While there might be some wastage due to drift, it is generally lower compared to other methods.


• Ultra-low volume (ULV) sprayer: These sprayers produce extremely fine droplets, which are highly susceptible to drift. Even slight wind or air currents can carry these droplets away from the target area, resulting in significant herbicide wastage.


• Hand sprayer: When used properly, hand sprayers can minimize drift since the applicator has more control over the direction and intensity of spraying. However, if not used correctly, drift can still occur.


• Duster: Dusters are used for applying dry formulations of herbicides. While they may not directly contribute to liquid drift, there can still be wastage due to dispersion of dry particles by wind.

Therefore, Option B: Ultra-low volume sprayer is the type of sprayer that causes more wastage of herbicide by drift.

IIIite is a group of clay minerals in a 2 : 1 ratio and is non-expanding. It is a secondary mineral precipitate, like a phyllosilicate or layered alumino-silicate. Its structure is a 2 : 1 sandwich of silica tetrahedron (T) - alumina octahedron (O) - silica tetrahedron (T) layers.

Plankton, Nekton and Benthon have aquatic emergence whether it is Marine water, freshwater or pond. These are not components of the Grassland ecosystem.

Auxin is an important phytohormone that is a key regulator of plant growth and development, helps in overcoming apical dominance induced by auxins and stimulates the formation of chloroplast in leaves. It is also involved in the process of nutrient mobilization.

Sericulture is the process of rearing silkworms for silk production. Also termed Silk Farming. Sericulture has become an important cottage industry. Today, China and India are the two main producers with more than 60% world's annual production.

In India, Uttar Pradesh is the highest sugarcane producing state, which is why it is also known as the "Sugar bowl of India". The area under cultivation of sugarcane in the Uttar Pradesh is 22.77 Lakh hectares with a production of 135.64 million tons.

Maize plants show three types of roots:
i. Adventitious roots: these are fibrous roots that develop from the lower nodes of the stem below the ground level which are the effective and active roots of the plant.
ii. Seminal roots: it develops from radical and is temporary.
iii. Brace or prop roots: produced from the lower two nodes to provide strength to the plant.

BGA stands for Blue green algae, used as biofertilizer in eco-friendly agricultural practice. As algae can grow in an aquatic medium, it is useful for paddy plantations where the field is submerged in water. BGA has emerged as an economical and environment friendly fertilizer.

How to calculate plant population:
1. The plant population of any field is given by multiplying the plant's spacing by the spacing between the rows.
2. The total area of the field a square meters.
3. Divide 10,000 by the result of multiplying the between plant spacing and the between rows spacing as given:
$${\text{Plant population =}}$$    $$\frac{{{\text{area of field under cultivation }}\left( {{{\text{m}}^2}} \right)}}{{{\text{between plant spacing (m)}} \times {\text{between rows spacing row (m)}}}}$$
Here, Space between the plants is 40 and 80.
Taking average is 60 centimeter = 0.6 meter
Space between the rows = 25 centimeter = 0.25 meter
$$\eqalign{ & {\text{Plant population}} = \frac{{5,000}}{{0.60 \times 0.25}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \frac{{5,000}}{{0.15}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 33,333 \cr} $$