Agronomy - Study Mode

[#1] Which gas is released from paddy fields
Correct Answer

(A) CH 4

Explanation

Solution: Rice fields are the source of various Greenhouse gases like Carbon dioxide, methane and nitrous oxide. Whereas the production of methane in flooded paddies is in abundance. Methane is produced as the terminal step of the anaerobic breakdown of organic matter in wetland rice soils by the presence of microorganisms.

[#2] What is the estimated extent of salt affected soils in India?
Correct Answer

(B) 7.42 mha

Explanation

Solution: The estimated extent of salt-affected soils in India is 7.42 mha approximately and out of which 3 mha is saline and the rest is sodic soil. It is around 2.1% of the geographical area of the country, is salt affected. Around 2.347 mha of the salt-affected soils occur in the Indo-Gangetic plains of the country.

[#3] Recovery Efficiency is based on
Correct Answer

(B) Uptake

Explanation

Solution: Recovery efficiency is defined as the difference in nutrient uptake in above-ground parts of the plant between the fertilized and unfertilized crop relative to the number of nutrients applied. It can be calculated separately for each nutrient based on its uptake.

[#4] The term "Evergreen Revolution" has been given by
Correct Answer

(B) Dr. M. S. Swaminathan

Explanation

Solution: Dr. M. S. Swaminathan is known as the father of the Green Revolution in India, and the term Evergreen Revolution was given by him only. He developed high-yielding varieties of wheat and later promoted sustainable development of agriculture in terms of the Evergreen Revolution.

[#5] The glycosidic linkages present in branching poins of Amylopectin
Correct Answer

(D) α-1, 6 linkage

Explanation

Solution: Amylopectin is a highly branched and high molecular weight macromolecule. It is a water-insoluble polysaccharide. It contains α-1, 4-glycosidic bonds between two glucose units in the straight chain and α-1, 6-glycosidic bonds at the branching points.