Agronomy MCQ Question and Answer | Agriculture MCQ Question

Allelopathy is a common biological phenomenon by which one organism produces biochemicals that influence the growth, survival, development and reproduction of other organisms.
In functional allelopathy, a precursor is released which is converted into active substances by some microorganisms.

Green manures are the crops that are grown especially for building and maintaining soil fertility.
Sesbania is a flowering plant and its common name is Riverhemp. These are mostly used in alley cropping to increase the soil’s nitrogen content.

Sesamum is an annual leguminous herb belonging to the Pedaliaceae family. It is widely cultivated and naturalized in tropical regions for its edible seeds. It is the source of sesame seeds.

Fruit is a mature ovary and it contains seeds that are the mature ovules after fertilization.
Fruits are generally acidic, it contains reducing sugar, acid, cellulose, phenols, anthocyanins and vitamin C also.

A diagnostic horizon in a soil layer is a combination of characteristics typical of that kind of soil. Certain features are illuvial iron- manganese coatings, depth of water table, texture, presence of organic matter, etc.
Entisols are the soil order that has no diagnostic horizon, entisols are the most abundant soil order, occupying about 16% of the global ice-free land area.

The potato is a stem tuber belonging to the Solanaceae family. And potassium is one of the essential nutrients for plant's growth and development.
Its application to potato plants shows a very good response, it increases the height of the plant and the crop's vigor and at the same time, it imparts resistance against drought, frost and diseases.

Weedicide is the chemical used in agriculture to kill the weeds that are unwanted plants or herbs that grow with the main crop and affect the overall yield.
2, 4 - D sodium salt 80% WP is a selective weedicide that controls broad-leaved weeds, edges, and germinating grass seedlings in the plantation of sugarcane, wheat, maize, citrus, grapes and tea.

National Biodiversity Board or Authority is headquartered in Chennai, Tamil Nadu, it was established on 1^st October 2003. It acts as a facilitating, regulating and advisory body to the government of India on the issues of conservation, sustainable use of biological resources and fair and equitable sharing of benefits.
Dr. V. B. Mathur is the latest Chairperson of the NBA (National Biodiversity Board).

Kerala is the state where Rice is grown below sea level for the past 2 centuries.
Kuttanad is the delta region of about 900 sq. km situated on the west coast of Kerala state and has the lowest altitude in India.

Rambler, NDRI Selection No. 1 and Moapa are the varieties of Lucerne.
Lucerne is a hardy leguminous forage and hay crop. It is native to south-west Asia and can survive in drought conditions. As it is a deep rooted crop so, it can extract water from the deeper zone of the soil.