Which mechanism is the first to start in wind erosion?
Correct answer A. Saltation
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Agriculture MCQs
Page 29 of Agriculture multiple-choice questions with answers. Tap an option to check yourself.
Page 29 of 135
What are the optimum temperature and pH for nitrifying bacteria?
Correct answer A. 25-40°C, pH 8-8.5
If a manure heap is left exposed to rain, which nutrient is lost most?
Correct answer D. N
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What type of disease is browning disease of rice?
Correct answer B. Physiological disease
What is the loss of nitrogen as ammonia (NH3) from alkaline soils called?
Correct answer A. Volatilisation
What are organisms that take carbon from atmospheric CO2 and energy from oxidising simple inorganic compounds called?
Correct answer B. Chemoautotroph
In nitrogen determination, 1 meq of HCl is equal to how much nitrogen?
Correct answer D. 14 mg of N
Which nitrogenous fertilisers should not be used on flooded soils?
Correct answer D. Both B & C
Who is credited with identifying the essentiality of nitrogen for plants?
Correct answer C. Theodore de Saussure
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Which instrument measures photosynthetically active radiation (PAR)?
Correct answer C. Quantum sensor
Which organisms dominate the initial stage of organic matter decomposition?
Correct answer B. Bacteria
Which rice leaf is sampled for tissue nutrient analysis?
Correct answer D. None of these
What is the rate at which water enters the soil called?
Correct answer D. Infiltration
What is the horizontal movement of water from an irrigation channel or canal, causing water loss, called?
Correct answer A. Seepage
Who is credited with identifying the essentiality of K, Ca, Mg and P for plants?
Correct answer A. C. Sprengel
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Who introduced the term rhizosphere for the soil zone influenced by plant roots?
Correct answer B. Hiltner
What is the approximate annual rainfall in Sargodha?
Correct answer A. 400 mm
One milligram equivalent of H+ (1 mg of H+) is equal to which amounts of other cations?
Correct answer D. All of the above
Compared with the coefficient of velocity, what is the value of the coefficient of discharge?
Correct answer D. Lesser
What is zinc deficiency in cotton known as?
Correct answer C. Little leaf