Agronomy MCQ Question and Answer | Agriculture MCQ Question

The potato is a starchy tuber belonging to the nightshade family Solanaceae.
Wild species of potato originated from the Southern United States. It was originally believed to be native and domesticated by Americans.
At present potatoes are a staple food worldwide and an integral part of much of the world’s food supply.

Proline is the amino acid that accumulated in crop plants under stress conditions.
It protects the plants from various stresses and also helps plants to recover from stress more rapidly. It can be applied to the stressed plants externally also to make the plant healthy and stress-free.

Jhum cultivation is especially practiced in Assam. Shifting cultivation is a practice in which farmland is cleared by slashing vegetation and burning forests for agricultural purposes.

Podu is also a form of shifting agriculture using slash and burn methods. Traditionally practiced on hill slopes of Andhra Pradesh.

Beera is the form of shifting agriculture and is known by the name Beera in Madhya Pradesh.

Ponam is the name of shifting agriculture practiced in Kerela.

The bread wheat genome is a hexaploid genome that possesses 42 chromosomes. The 21 pairs of chromosomes are divided into seven groups of six chromosomes, based on the similarity of gene order.

Jowar is a species of grass cultivated for its grain, which is used for food for humans, animal feed and ethanol production. It is the world’s fifth most important cereal crop after Rice, wheat, maize and barley, with 59.34 million metric tons of annual production in 2018.
The required plant population of Jowar is obtained by using a seed rate of 12 - 15 kg/ha.

The yellow revolution is one of the major revolutions brought in agriculture launched to increase the production of edible oil seeds in the country to meet domestic demand.
Plantation of hybrid seeds like mustard, sesame, etc. to increase the production of edible oil.
It was first started in the Philippines on 22^nd February 1986.

Remote sensing is the technique used in the geological sciences as a data acquisition method complementary to field observation.
It allows the mapping of geological characteristics of regions without physical contact with the area. It helps in studying geological mapping, geological hazards and economic geology.
It also helps in studying cropped areas, soil characters, underground water, etc.

The correct answer is Option B: CRI (Crown Root Initiation).

Here's why:

Understanding the Stages: Wheat plants go through several growth stages. Tillering, jointing, CRI (Crown Root Initiation), and flowering are all important.

Limited Irrigation Impact: When you can only irrigate once, you need to choose the stage where water stress will cause the MOST significant yield reduction.

Why CRI is Critical:
* The CRI stage (around 21 days after sowing) is when the plant starts developing its permanent root system.
* This root system is crucial for nutrient and water uptake throughout the rest of the plant's life.
* Water stress during CRI severely limits root development, leading to stunted growth and reduced grain yield.

Why Other Options Are Less Critical (with only one irrigation):
* Tillering: While important for plant density, water stress here is less damaging than at CRI, especially if later growth is supported.
* Jointing: This is when the stem elongates. While water is needed, a good root system established during CRI is more fundamental.
* Flowering: Important for grain formation, but if the plant suffered severely at CRI due to lack of water, the potential yield will already be significantly reduced, making a later irrigation less effective than one at the CRI stage.

In short, irrigating at the CRI stage gives the wheat plant the best foundation for healthy growth and maximum yield under limited irrigation conditions.

Phalaris minor is a tufted annual bunchgrass up to 1.8 metres in height. It has a spike-like panicle. It is used as fodder or forage for livestock and birdseed. It is a potential contaminant of seed crops.
It is a common weed in the wheat crop. It can be controlled by controlled grazing, regular mowing and the regular use of selective herbicide Isoproturon.

Crop logging is a system of monitoring the nutritional status of plats by periodic and regular sampling and analysis of soil and plant parts.
Crop logging is used in sugarcane to soil fertility evaluation, plant analysis for assessing the requirement of nutrients for crop production, assessing crop damage and testing of suitability of Fertilizers.