Agronomy MCQ Question and Answer | Agriculture MCQ Question

The National Research Centre on Rapeseed and Mustard (NRCRM) is located at Sewar Bharatpur, Rajasthan. It was established on 20^th October 1993, under ICAR to carry out basic, strategic, and applied research on rapeseed and mustard. It also engages in developing ecologically sound and economically viable agro-production and protection technologies.

Cereal cyst nematodes (CCNs) are the most commonly available nematode pests that limit the yield of small grain pests like wheat and barley. Nematode-resistant varieties are in high demand. Raj Kiran (RD-387) is one of the nematode resistant varieties of barley.

Wheat is known as the king of cereals for many reasons, like:
• It is the main part of the diet of humans.
• It is the main ingredient for making bread.
• It can be grown in almost all types of soil, under any climatic conditions and can withstand any parameters for cultivation.
• It is cultivated in its highest area of coverage.

The space between the soil particles in the pore space.
The formulas for calculating the pore space percentage $${\text{PS}} = \left( {1 - \frac{{{\text{BD}}}}{{{\text{PD}}}}} \right) \times 100$$
where PS is Pore Space, BD is Bulk Density and PD is Particle Density.
Putting all the values in the above formula
$${\text{PS}} = \left( {1 - \frac{{1.16}}{{2.62}}} \right) \times 100 = 0.557 \times 100 = 55.7\% $$

Albedo is the measure of reflectivity, the amount of sunlight reflected by any surface. All the black surfaces have the lowest albedo as they reflect the least amount of radiation and absorb most of the radiation. Because moist black soil absorbs the most light of all the black soils, it has the lowest albedo. The highest albedo is found in snow-covered areas and deserts.

Maize has become a staple food, cultivated in almost all parts of the world. The leafy stalk of the plant produces pollen inflorescences, also called "tassels", and separate ovuliferous inflorescences, called "ears", which when fertilized, produce kernels or seeds. In maize plants made of silk and tassels, the tassels appear first.

Phosphorus is most abundant in the soil at pH 6 to 7, but at pH 4, i.e. in acidic soils, the dominant ionic form of phosphorus present is orthophosphates, i.e., $${{\text{H}}_2}{\text{PO}}_4^ - .$$   Availability of phosphorus decreased with an increase in pH. But to maintain the availability of phosphorus at a high pH, the percentage of organic matter in the soil is important.

Fertilizer application in maize plantations should be completed before the tasseling stage, as tasseling is the stage of formation of flowering and reproduction stages, so the nutrient requirement should be full field before the tasseling stage for maximum yield. It takes place when the plant reaches its full height and begins to shed its pollen for fertilization.

India is an agricultural country. 70% of the population relies on agriculture for their livelihood. As per the survey done at the end of the fiscal year 2021, in India, the total area covered under the cultivation of food grain crops is between 100 - 150 million hectares. While other crops like cotton, jute and other commercial products are outside of this. The total production of food grains in India is about 316 million tons, as recorded during 2020 - 21.

The project directorate for cropping systems research is located at Modipuram, Meerut, Uttar Pradesh. This came into effect on 23^rd February 2010. Its main prospective is sustainable management of farm resources for achieving household food, nutritional, and livelihood security.