Agronomy - Study Mode

[#376] Which one of the following crop rotation is the best for maintaining soil fertility
Correct Answer

(D) Soybean - Wheat - Greengram

Explanation

Solution: Rotation of crops is a cultivation practice that is very good for maintaining soil fertility. Out of the following options, Soybean - Wheat - Greengram is the best crop rotation crop. Legume crops help in recharging the nitrogen content of the soil and sustain soil fertility without the need of applying fertilizers.

[#377] All the grain legumes have a high photo respiration because of
Correct Answer

(A) C 3 mechanism

Explanation

Solution: When any photosynthetic plants yield 3-carbon acid or 3-phosphoglyceric acid (PGA) as their first product during the carbon dioxide fixation is termed as C 3 mechanism and C 3 plants. Most C 3 plants have no special features to combat photorespiration. The first step in the Calvin cycle is the fixation of carbon dioxide by Rubisco, thus all the grain legumes have high photorespiration because of the C 3 mechanism.

[#378] Thaichung Native was the popular variety introduced in India. It belongs to
Correct Answer

(C) Paddy

Explanation

Solution: Taichung Native 1 (TN1) is a popular variety of Rice (Paddy) that was developed in Taiwan and introduced to India. It is also a semi-dwarf variety of rice and played a key role in a green revolution. It is also used as a susceptible check for insect and pathogen resistance studies.

[#379] Substances responsible for bread making quality of wheat is
Correct Answer

(A) Gluten

Explanation

Solution: Gluten protein present in wheat is the most important substance in making bread from wheat because it provides the elasticity and extensibility required to make bread. It adds texture and viscous properties to our bread.

[#380] The soil carried in saltation consists of particle size
Correct Answer

(A) 0.1 to 0.5 mm

Explanation

Solution: Saltation is the process in which the sediment particles are transported in a series of irregular bounces or short jumps along the ground surface. The soil carried in the saltation process is of particle size 0.1 to 0.5 mm, which is light enough to be lifted and large enough to be suspended.