List of top Water Science and Technology Questions on Plant Physiology

At present concentration of $\text{CO}_2$ in the atmosphere is about ____}

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Increase in temperature increases the transpirational rate in plant.
Reason R: Increase in temperature lower the relative humidity and widen the opening of stomata.
In light of the above statements, choose the most appropriate answer from the options given below

Net gain of ATP molecules in complete aerobic breakdown of one molecule of glucose in most eukaryotes is _________.

Which of the following are true about nitrogen nutrition in plant?
A. Nitrogen is the constituent of chlorophyll, amino-acids, protein, RNA and DNA.
B. Nitrogen deficiency symptoms appears first on the new leaves.
C. Excess nitrogen advances maturity of crops.
D. In nitrogen, deficiency symptoms first appears on the tip of the leaf.
E. In plant, nitrogen translocated from older leaves to new leaves.
Choose the correct answer from the options given below:

Which of the following is NOT true about phosphorus nutrition in plant?

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Sandy soil is lighter in weight than that of equal volume of clay soil.
Reason R: Addition of organic matter in soil for consecutive two years will not change the soil texture.
In light of the above statements, choose the correct answer from the options given below:

Given below are two statements
Statement I: Culverts are only used when the irrigation channel is at a higher elevation than the obstruction to be crossed.
Statement II: Siphons are used when the channel level is almost same or higher than the obstruction.
In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements
Statement I: In surface irrigation, the advance phase is the time required for water to advance from the inlet to the outlet of the field.
Statement II: The depletion phase is the time required for water to remain on the field after the advance phase is completed.
In the light of the above statements, choose the correct answer from the options given below:

A useful thumb rule in check basin design is that the water spread in the entire check basin should cover in how much percentage of the time required to infiltrate the net depth of irrigation water?

Given below are two statements
Statement I: Fish meal is a good source of animal protein.
Statement II: Soybean meal is a good source of vegetable protein.
In light of the above statements, choose the correct answer from the options given below:

Arrange these crops in increasing order of area under cultivation in India:
A. Wheat
B. Cotton
C. Potato
D. Rice
E. Oat
Choose the correct answer from the options given below:

Which of the following plant nutrients are secondary plant nutrients?
A. Zinc
B. Calcium
C. Potassium
D. Sulphur
E. Manganese
Choose the correct answer from the options given below:

In the National Water Policy (2002) the highest priority in allocation of water resources is given to:

Given below are two statements
Statement I: In major irrigation projects, all irrigation schemes have a culturable command area of 10,000 ha or more.
Statement II: Medium irrigation projects have a culturable command area less than 2,000 ha.
In light of the above statements, choose the correct answer from the options given below:

Nitrogen element facilitates which functions in plants
A. Chlorophyll synthesis
B. Protein synthesis
C. Nucleic acid synthesis
D. Pollen germination
Choose the correct answer from the options given below:

Which one of the following is a measure of how much light that hits a surface is reflected without being absorbed?

Theory of proton transport concept given by Levitt in 1974 related to

Crassulacean acid metabolism is present in

Given below are two statements
Statement I: Photosynthesis is a reduction process whereas respiration is an oxidation process
Statement II: Photosynthesis process is not sensitive to the wavelength of light
In the light of the above statements, choose the most appropriate from the options given below