A. Hold back stem growth and halt plants at a desired height
B. Cause early maturation of plants
C. Accelerate ripening of food and grain
D. Produce seedless fruit
Related Mcqs:
- A fertiliser plant is classified as a gas based fertiliser plant, when it uses ______________ gas as a source of hydrogen for the manufacture of ammonia?
A. Coke oven
B. Producer
C. Natural
D. Coal - Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant ?
A. Urea
B. CAN
C. Ammonium sulphate
D. Superphosphate - Nitric acid is produced on commercial scale in a fertiliser plant by___________________?
A. Oxidation of ammonia
B. CaNO3 + H2SO4 reaction
C. Passing air through high voltage electric arc
D. None of these - The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is _____________ fertiliser?
A. Nitrogenous
B. Phosphatic
C. Potassic
D. None of these - The optimum size of the ammonia plant is ______________ tons/day?
A. 10
B. 100
C. 1000
D. 1000 - Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth ?
A. Nitrogenous fertiliser
B. Potassic fertiliser
C. Phosphatic fertiliser
D. None of these - Which of the following does not come under the category of ‘secondary nutrient’ for plant growth ?
A. Calcium
B. Magnesium
C. Sulphur
D. Oxygen - Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the__________________?
A. Osmotic pressure of the soil water becomes less than that of the plant sap
B. Soil becomes too alkaline
C. Osmotic pressure of the soil water becomes higher than that of the plant sap
D. Soil becomes too acidic - In an ammonia plant, the purge off is essential to___________________?
A. Maintain inert gas concentration within a limit
B. Remove excess poisonous gases
C. Maintain H2 : N2 ratio at 3 :1
D. Remove uncondensed ammonia vapour - pH value of soil is maintained at ______________ by the addition of fertiliser for optimum growth and health of the plant?
A. 4-5
B. 7-8
C. 9-10
D. 12-13
