Agronomy MCQ Question and Answer | Agriculture MCQ Question

The scientific name of berseem is Trifolium alexandrinum. It is annual clover cultivated mostly in irrigated subtropical regions and used as a leguminous crop.
Berseem is generally frost-sensitive. It can be used as forage, green manure as well as a cover crop.

The Indian Agricultural Statistics Research Institute (IARS) was renamed on 2^nd July 1959 and is located in New Delhi. This institute is located on the campus of IARI, PUSA in New Delhi.
Its motive is to develop new techniques for the design of agricultural experiments as well as to analyze data in agriculture.

Based on cultivation the groundnut is divided into two classes, the erect and the other one is spreading types.
The erect is originated from Arachis hypogea subspecies fastigiata whereas the trailing or spreading type of groundnut includes Arachis hypogea subspecies procumbens.

Water use efficiency is the ratio of water used in plant metabolism to water lost by the plant through transpiration.
Water use efficiency (WUE) is a measure of the amount of biomass produced per unit of water used by a plant. It is based on the concept introduced 100 years ago by Briggs and Shantz in 1913 showing a relationship between plant productivity and water use.
WUE is highest for the Finger millet (F. millet) as it adapted to hot and semi-arid conditions. It can withstand cultivation at altitudes over 2000 m above sea level, because of its high drought tolerance and the long storage time of the grains.

Nitrogen is applied to transplanted rice in the proportion of 50% at basal + 25% at tillering + 25% panicle emergence stage.
Nitrogen is an essential plant nutrient required by rice at every stage of development. It promotes rapid growth and improves grain yield and grain quality through higher tillering, leaf area development grain formation, grain filling, and protein synthesis.

Shifting agriculture is an agriculture practice in which a piece of land is cultivated temporarily, then abandoned while post disturbance fallow vegetation is allowed to freely grow. The land is cleared by the slash and burn method. This method is also known as "Jhum kheti”.
The area under shifting cultivation is around 5 million hectares. It is largely practiced in hilly areas and the northeastern region of India.

The process of replacement of one atom with another atom of similar size, in a crystal lattice of a soil clay without disrupting or changing the crystal structure of the mineral, is termed Isomorphic substitution.
It can also be referred to as the process where one structural cation is replaced by another of similar size and this kind of replacement signifies the primary cause of both negative and positive charges in clay minerals.

Sugarcane is a tall, stout, jointed, fibrous stalks, perennial grass that is used for sugar production as it is rich in sucrose. The stems grow into cane stalk, which when mature, constitutes around 75% of the entire plant.
Hardening in the sugarcane plant occurs when there is an increase in its sugar content.
A mature stalk is typically composed of 11% - 16% fiber, 12% - 16% soluble sugars, 2% - 3% non-sugar carbohydrates and 63% - 73% of water.

Our atmosphere is the blanket of gases and air that surrounds our Earth.
Based on temperature, the layers of the atmosphere are divided into four major layers. These are the troposphere (17°C - -51°C), the stratosphere (-3°C), the mesosphere (-85°C) and the thermosphere (up to 4,500 degrees Fahrenheit).

The agricultural land area of India is divided into 15 agro-climatic zones and further divided into 72 more sub-divisions. It is based on soil type, climates, rainfall, etc.
These are:
1. Western Himalayan division
2. Eastern Himalayan division
3. Lower Gangetic plain region
4. Middle Gangetic plain region
5. Upper Gangetic plain region
6. Trans-Gangetic plain region
7. Eastern plateau and hill region
8. Central plateau and hill region
9. Western plateau and hill region
10. Southern plateau and hill region
11. East coast plain and hill region
12. West coast plain and hill region
13. Gujarat plain and hill region
14. Western plain and hill region
15. Island region