Agronomy MCQ Question and Answer | Agriculture MCQ Question

An increase in the application of nitrogen content in sugarcane fields may lead to increased yield but the sugar content in sugarcane juice decreases.
The reduction in sucrose percentage accompanied by the increase in Nitrogen levels may be due to increased water retention in millable cane leading to a reduction in sucrose determined as a percentage of stalk fresh weight.
Whereas Nitrogen is a key restrictive factor for continuous sugarcane output in terms of yield.

Mustard seeds contain the substance Glucosinolate, also known as sinigrin. The crushing of mustard seeds for oil leads to the release of the enzyme myrosinase.
Thus the combination of myrosinase and Glucosinolate produces AITC (Allyl isothiocyanate), which is a wide-spectrum antimicrobial compound that is responsible for the characteristic pungency of mustard oil.

Dibbling is a method of sowing seeds in which we place seeds in the holes or pits at equal predetermined distances and depths. This procedure is done by dibble, planter, or manually.
The main advantages of dibbling are that fewer seeds are required, germination is rapid and uniform and at the same time, seedling vigor is good. It requires a seed rate of 20 - 30 kg/ha.

Intercropping involves cultivating two or more crops in a field simultaneously. Mostly it is done as one legume crop and the other one as a non-legume crop, but in Madhya Pradesh both legumes i.e. arhar and soybean are grown as intercrops.
Intercropping of arhar with soybean is better for risk management and utilization of nutrients from different layers of soil.

Interculture is the practice of simultaneously growing two or more crops on the same plot. It is very useful in maintaining soil fertility and nutrient supply in crops and soil. Interculture is mostly done with one legume plant and the other non-legume. As groundnut is a legume plant, it can be intercropped with any other non-legume plant but it is avoided at the pegging stage as this needs a lot of nutrients, nutrient sharing with some other plant may lead to reduced yield.

ICAR stands for the Indian Council of Agricultural Research and is an autonomous organization responsible for coordinating agricultural education and research in our country. It was established on 16^th July 1929 and is located in New Delhi.
The Director ICAR is Trilochan Mohapatra. The Union Minister of Agriculture serves as its President.

The pigeon pea is a perennial legume belonging to the family Fabaceae.
Prabhat is a variety of pigeon pea and is an extra early maturing. It arose as segregant from variety T-21. The plant type is determinate, bunchy, and flat topped. It matures in 110 to 115 days, whereas normally all varieties take at least 140 - 145 days.

Mung bean is also known as green gram, mash belongs to the legume family. It is mainly cultivated in East, southeast and South Asia.
The Mung bean is believed to be originated in central Asia i.e. where India, where it was domesticated as early as 1500 BC.

C4 cycle is referred to as the β-carboxylation pathway and cooperative photosynthesis.
The 4-carbon oxaloacetic acid is the first stable compound of the Hatch and Slack cycle. PEPCase i.e. Phosphophoenolpyruvate carboxylase is an enzyme involved in C4 pathways and is the primary carbon assimilatory enzyme in C4.

Nitrogen is the most restrictive nutrient for rice production. Paddy plants need rice to develop an adequate number of panicles. It is very important for the increase of plant height, leaf size, panicle number and ultimately high yield per hectare.
It is absorbed as NH₄ ions form under waterlogged conditions.