What is the practice of growing land plants in an aerated nutrient solution called?
Correct answer C. Hydroponics
Subject / 2,686 questions
Agriculture MCQs
Page 23 of Agriculture multiple-choice questions with answers. Tap an option to check yourself.
Page 23 of 135
What is the wearing away of the land surface by wind, water, ice or other geological agents called?
Correct answer C. Soil erosion
What is material deposited by wind called?
Correct answer D. Eolian
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What are rocks that form from molten magma called?
Correct answer C. Igneous rocks
Which fertilisers can be used to correct boron deficiency?
Correct answer D. All of the above
What term describes clear water with little organic matter or sediment and minimal biological activity?
Correct answer A. Oligotrophic
In what percentages does sewage contain water and solids?
Correct answer C. 99 & 1
What percentage of nitrogen does ammonium nitrate fertiliser contain?
Correct answer C. 33
Antioxidants are used to slow down which process?
Correct answer B. Oxidation
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What nutrient content does triple superphosphate (TSP) contain?
Correct answer D. 46% P
Which silica mineral occurs most abundantly in soil?
Correct answer A. Quartz
What is the exact formula given for sodium hexametaphosphate?
Correct answer C. [(NaPO3)13]
What is the chemical formula of ammonium acetate?
Correct answer B. NH4OAc
Up to what concentration is boron in irrigation water considered safe?
Correct answer A. 0.7 ppm
In the ignition method for soil organic phosphorus, what temperature is the soil ignited at?
Correct answer A. 550ºC
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When diluting an acid, what is the correct order of mixing?
Correct answer A. Acid to water
What is the biochemical reduction of nitrate to nitrite or nitrogen gas called?
Correct answer A. Denitrification
What is a treeless Arctic plain called?
Correct answer B. Tundra
In which phenomenon are nitrogen gases involved?
Correct answer B. Acid rains
What does particulate matter consist of?
Correct answer B. Solid and liquid