Free Agronomy MCQ Question and Answers

Question 1

What crop of the following exhibits protandry?

Accepted Answer

Carrot

Answer

Protandry is a condition where the male reproductive organs (anthers) mature and shed pollen before the female reproductive organs (stigmas) become receptive. This mechanism promotes cross-pollination and prevents self-pollination within the same flower. Among the given options, carrot (Daucus carota) flowers are known to exhibit protandry, where the anthers release pollen before the stigmas are ready to receive it.

Question 2

Which of the following crops can withstand draught better?

Accepted Answer

Cowpea

Answer

Cowpea (Vigna unguiculata) is renowned for its exceptional drought tolerance compared to many other pulse crops. It possesses a deep root system that allows it to access water from deeper soil layers and has physiological mechanisms to cope with water stress. This makes it a crucial crop for cultivation in arid and semi-arid regions where water availability is limited and rainfall is erratic.

Question 3

What crop has the highest likelihood of genetic variation?

Accepted Answer

Maize

Answer

Maize (corn) exhibits a high degree of genetic variation primarily because it is an open-pollinated, cross-pollinating crop. Its reproductive system, with separate male and female flowers on the same plant (monoecious), naturally encourages outcrossing. This constant mixing of genetic material from different parent plants leads to a wide range of genetic diversity within maize populations, making it highly amenable to breeding and selection.

Question 4

Which of the following crops may be grown without irrigation?

Accepted Answer

Millets

Answer

Millets, such as sorghum, pearl millet, and finger millet, are known for their resilience and ability to thrive in harsh, arid, and semi-arid conditions with minimal water. They are often referred to as 'rainfed crops' because they can be successfully grown relying solely on natural rainfall, making them ideal for regions with limited irrigation facilities. Other crops like wheat, soybean, and sugarcane typically require more consistent moisture or irrigation for optimal yields.

Question 5

What of the following crops are seedlings used to sow?

Accepted Answer

Paddy

Answer

Paddy (rice) is commonly cultivated by transplanting seedlings rather than direct seeding in many parts of the world, including India. Seeds are first sown in a nursery bed, and after a few weeks, the young seedlings are carefully uprooted and transplanted into puddled fields. This method helps ensure a uniform plant stand, better weed control, and often higher yields compared to direct sowing.

Agronomy Practice Test

Agronomy Practice Test

Free Agronomy MCQ Question and Answers