Agronomy MCQ Question and Answer | Agriculture MCQ Question

The area that corresponds to the total sown area is termed the area under cultivation. And the total cultivated area in India was approximately 155.2 million hectares as per the survey held in the fiscal year 2015, which is now increased to 180 mha.

The condition of extensive interveinal chlorosis of older leaves which later infects the younger leaves is due to a deficiency of magnesium. Sometimes it causes reddish brown tints and early leaf fall. Magnesium deficiency is common in tomatoes, apples, grapevines, raspberries, roses and rhododendrons.

Ginning is the process of transforming cotton from field to fabric while ginning percentage is calculated mathematically through a formula:
$${\text{GP}}\% = \frac{{{\text{Weight of link}}}}{{{\text{Weight of seed cotton}}}} \times 100$$
Out turn of lint to seed is expressed as a percentage by weight and it normally varies between 24% - 38%.

Different variety of the same category is nitrogen-fixing bacteria also called Rhizobium is responsible for fixing atmospheric nitrogen in different leguminous plants. The bacteria responsible for nitrogen fixation in soybean is R. japonicum. It forms a symbiotic relationship with host plants.

The inherent capacity of soil to supply plant nutrients in adequate amounts and suitable proportions is called Soil fertility. It can also be defined as the capability of the soil to provide all the essential nutrients in all available forms to the plant.

Groundnut has a unique ability to embed fertilized ovary of the flower into the ground through a specialized organ known as peg or gynopore. This peg is a tube-like structure formed after successful fertilization in flowers which is further developed into fruits.

UPAS 120 is an early maturing variety of pigeonpea that takes approximately 120 days to mature. It is a mutant variety that is in use since 1976. The plants developed are medium tall, open and of semi-spreading type.

Water requirement (WR) = ET or CU + application losses + special needs.
In hot climate evaporation loss is also being added. So, it is an overall combination of consumptive use, water required for special operations and other economically unavoidable losses of water.

There are three biodiversity hotspots present in India and total of 35 in the world. These are the Western Ghats, the Himalayas and the Indo-Burma region. Each one of them comprises at least 1500 species of vascular plants and it should have lost greater than or equal to 70% of its original habitat.

Intercropping is the most sustainable practice and is considered to be an environmentally sound and economically advantageous cropping system. Maize is mostly intercropped with legumes as it provides shade to legume species as they are smaller in size in comparison to maize plants. Thus intercropping of maize and soybean are complementary relations, as both complement each other.