Agronomy - Study Mode

[#741] An example of companion cropping is
Correct Answer

(A) Sugarcane + potato

Explanation

Solution: A companion cropping is a crop sown with the other crop to gain some advantage in yield or crop protection from pests or also one can act as support for another climber crop. Sugarcane + potato is an example of companion cropping. Sugarcane is a tall plant while potatoes can be grown underground, both can be grown simultaneously in the same field without harming each other.

[#742] First variety of mustard developed through biotechnology by somatic hybridisation which is
Correct Answer

(A) Pusa Jai Kisan

Explanation

Solution: ‘Pusa Jai Kisan' is the high yielding mustard variety, that has been developed through the tissue culture technique. Somatic hybridization is a technique that has been used to tap the potential of related or distant species of crops by the fusion of protoplasts of two different plants. Bio902, is lab name of Pusa Jai Kisan, was released in the year 1994 for commercial cultivation as Pusa Jai Kisan.

[#743] Which one of the following is not correctly matched in the term of Acid forming fertilizers and Acid equivalent?
Correct Answer

(B) Urea ⇔ 60

Explanation

Solution: Acid forming fertilizers are acidifying agents which can help to raise the acidity levels of the soil. And Acid equivalent is that portion of a formulation that theoretically could be converted back to the corresponding parent acid. The acid equivalent of urea is 80, not 60.

[#744] An acid derived from green leaves of chickpea prescribed for intestinal disorders is
Correct Answer

(A) Oxalic acid

Explanation

Solution: Oxalic acid is the acid derived from the green leaves of chickpea and it is prescribed for intestinal disorders. It also prevents the formation of kidney stones and reduces the risk of cystic fibrosis.

[#745] Atmospheric layer nearest to the earth surface is
Correct Answer

(A) Troposphere

Explanation

Solution: Our atmosphere is divided into five layers. These are the troposphere, stratosphere, mesosphere, thermosphere and exosphere from lowest to top in series. The troposphere is the lowest layer of the atmosphere and thus it is nearest to our Earth. It extends upward to about 10 km (6.2 miles or about 33,000 feet) above sea level.