Agronomy - Study Mode

[#386] The first commercial cotton of the world is
Correct Answer

(D) Kuber

Explanation

Solution: The first commercial cotton hybrid in the world, Hybrid-4, was released in 1970 in India. Hybrid-4 marked a significant milestone in cotton production as it was the first hybrid variety developed for large-scale commercial cultivation. This hybrid offered higher yields and better adaptability compared to traditional cotton varieties, revolutionizing cotton farming practices. Note: Its development showcased the potential of hybrid technology in improving agricultural productivity.

[#387] In addition nitrogen, oxygen and carbon dioxide the other principle gas present in atmosphere is
Correct Answer

(B) Ozone

Explanation

Solution: Our atmosphere is a mixture of gases. Although its main constituents are nitrogen (78%) and oxygen (21%). It also contains gases like carbon dioxide, ozone, argon and traces of other neon, helium, methane, krypton, and hydrogen. Undoubtedly the role of ozone in our atmosphere is inimitable.

[#388] PDM 11 is a variety of
Correct Answer

(C) Mung

Explanation

Solution: PDM 11 is one of the varieties of mung bean also called green gram. It is an early maturing variety and tolerant to powdery mildew and leaf spots. Moreover, it is a short duration variety of 60 days. It was developed by crossing china mung X Type 1.

[#389] Trench method of sugarcane planting is used in
Correct Answer

(C) Coastal areas

Explanation

Solution: The trench method is also known as the Java method of planting sugarcane. In this method, trenches at a distance of 75 - 90 cm are dug with the help of a ridger or manually to save the cop from lodging. This practice is used mostly in coastal areas where the crops grow very tall and the strong winds during the rainy season cause lodging of canes.

[#390] For ripening of rice, temperature should be lies between
Correct Answer

(A) 20° - 25°C

Explanation

Solution: The ripening process in rice includes young panicle formation to heading and flowering and the other from fertilization to grain maturation. Because rice is a tropical crop, the average temperature during the growing season is between 20° and 25° C, with plenty of sunshine throughout its life cycle.