Agronomy - Study Mode

[#541] Which one of the following is not narrow leaved weeds
Correct Answer

(D) Melilotus indica

Explanation

Solution: Melilotus indica is a common weed with typical weedy attributes and belongs to the family Fabaceae. It reproduces in large numbers and exhibits dormancy to prolong persistence in fields. It is an annual or biennial herb from 10 - 50 cms in height with yellow flowers and is most commonly named sweet clover. It is used as a source of nectar for bees, forage and as a soil improver.

[#542] 'Chipsona' is a variety of
Correct Answer

(D) Potato

Explanation

Solution: Chipsona is one of the best varieties of potatoes and is most commonly used in making chips and French fries. It is further subdivided into two categories Kufri chipsona-1 and Kufri chipsona-3. This variety is for growing in north Indian Plains. It shows medium maturity with high dry matter and a low level of reducing sugars and phenols. Most importantly it is resistant to late blight.

[#543] Highest Water Use Efficiency (WUE) among the field crops is of
Correct Answer

(C) Finger millet

Explanation

Solution: Water use efficiency (WUE) is a measure of the amount of biomass produced per unit of water used by a plant. It is based on the concept introduced 100 years ago by Briggs and Shantz in 1913 showing a relationship between plant productivity and water use. WUE is highest for the finger millet as it adapted to hot and semi-arid conditions. It can withstand cultivation at altitudes over 2000 m above sea level, because of its high drought tolerance and the long storage time of the grains.

[#544] A cusec of water is equivalent to
Correct Answer

(D) 1780 LPM

Explanation

Solution: Cusec is the measure of the rate of flow of water. This unit is most commonly used by the irrigation department. 1 cusec = 1 cubic foot of water flow per second 1 cusec = 28.32 litres of water flow per second 1 cusec = 1780 lpm.

[#545] Amount of non-nuclear DNA present in a cell
Correct Answer

(B) $${frac{1}{3}^{{ ext{rd}}}}$$ of nuclear DNA

Explanation

Solution: Non-nuclear DNA is the extrachromosomal DNA present in mitochondria or chloroplast of some cell, i.e. any DNA that is found off the chromosomes. Most of the DNA in an individual genome is found in chromosomes contained in the nucleus, but the amount of non-nuclear DNA present in a cell is around $${frac{1}{3}^{{ ext{rd}}}}$$ of the nuclear DNA.