Agronomy - Study Mode
[#461] Triazines are mostly used in
Correct Answer
(B) Maize
Explanation
Solution: Triazine is the heterocyclic compound used in livestock, vegetables, ornamental applications, or as herbicides, as an active ingredient to increase the weed control spectrum. Out of the following options, it is mostly used in Maize to control the weed. It is quite efficient and low-cost effective weed control.
[#462] Prussic acid is more in Sorghum
Correct Answer
(A) In the drought sriken and 2 nd growth plants
Explanation
Solution: Prussic acid is hydrocyanic acid or cyanide. It is a rapidly acting lethal toxin. It inhibits oxygen utilization by the animal at the cellular level resulting in suffocation. Prussic is formed in sorghum when the leaf tissues are ruptured by grazing or chopping, hence it is found more in the drought stricken and 2 nd growth of plants.
[#463] Bacterial diseases are controlled by use of chemicals
Correct Answer
(A) Antibiotics
Explanation
Solution: Antibiotics are the most effective to fight against bacterial infections in living organisms whether it is plants or humans or animals. It works by inhibiting the biochemical pathway of the bacteria. It works specifically on the different types of bacteria without affecting the host body. Fungicides as the name suggest act against the fungus and viricides inhibit the multiplication of the virus.
[#464] Which one of the following crops is most sensitive to both excess moisture and drought
Correct Answer
(B) Maize
Explanation
Solution: Maize is a crop that is highly sensitive to drought and excess moisture. Maize is the world's leading crop and is widely cultivated as a cereal grain. It is also known as the queen of cereals because of its highest genetic yield potential. Drought tolerant maize varieties have an enhanced ability to withstand abiotic stress like drought. It is generally considered a flood tolerant species because of its ability to produce early adventitious roots and morphological adapters.
[#465] Country having the maximum area of hybrid rice is
Correct Answer
(D) China
Explanation
Solution: China is the birthplace of hybrid rice, it was being researched and brought into cultivation from there only. Chinese scientist Yuan Longping is known as the 'Father of Hybrid Rice'. China is the country with a maximum area of hybrid rice, it is about 30 million hectares.