Agronomy - Study Mode

[#601] Early sowing in pulses is not recommended mainly due to,
Correct Answer

(A) More Vegetative growth

Explanation

Solution: Pulses are perennial plants grown in different cropping systems. Despite the implementation of the cropping system, early sowing in pulses is not recommended mainly due to more vegetative growth. It is advised to wait for suitable environmental factors for better plant germination and survival.

[#602] An annual weed commonly found in rice field is
Correct Answer

(B) Echinochloa crusgalli

Explanation

Solution: The undesirable plant in any plantation is considered a weed. The most common weeds of rice plantations especially in Asia are Cyperus iria, Cyperus maritimus, Echinochloa glabrescens, Cyperus rotundus, Cyperus difformis, Paspalum distichum, Echinochloa colona, Echinochloa crusgalli and Marsilea minuta.

[#603] If all values are -ve then S. D. will be
Correct Answer

(B) +ve

Explanation

Solution: The standard deviation (S. D.) is a measure of the amount of variation or dispersion of a set of values. A low S. D. indicates that the values tend to be close to the mean while a high S. D. means that the values are spread out over a wider range. Hence, if all values are negative then S. D. will be positive.

[#604] The solar radiation is measured by
Correct Answer

(C) Pyrheliometer

Explanation

Solution: Pyrheliometer is an instrument to measure a direct beam of solar radiation. Sunlight enters the instrument through a window and is directed onto a thermopile which converts heat to an electrical signal that can be recorded. It is used in meteorological and climate observations, material testing research and assessment of the efficiency of solar collectors.

[#605] Main objective of puddling in paddy is to
Correct Answer

(A) Create impermeable layer in the soil

Explanation

Solution: Puddling is the tillage of rice paddies while submerged, it is an ancient practice that is used to prepare the field for rice cultivation. Earlier it was done by buffalo or ox, nowadays with the advancement of technologies, tractors are used. This practice reduces the percolation rate of water and creates an impermeable layer by churning the clay particles.