Fertilizers — Natural and Artificial NDA Questions

NDA Chemistry

Fertilizers — Natural and Artificial MCQ Questions


7.
What is 'manure' in the context of agricultural science (NCERT Class 9)?
A.
Manure is a chemically synthesised product that supplies specific nutrients like NPK in concentrated form
B.
Manure is a type of pesticide used to protect crops from disease
C.
Manure is a natural substance prepared by decomposition of animal excreta and plant waste that enriches the soil with organic matter and nutrients
D.
Manure is a water-soluble salt sprayed on leaves for foliar nutrition
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ANSWER :
C. Manure is a natural substance prepared by decomposition of animal excreta and plant waste that enriches the soil with organic matter and nutrients
8.
On the basis of the biological material used, NCERT Class 9 classifies manure into which three types?
A.
Farm Yard Manure (FYM), Sewage manure and Night soil
B.
Organic manure, Inorganic manure and Mixed manure
C.
Nitrogen manure, Phosphorus manure and Potassium manure
D.
Compost, Vermicompost and Green manure
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ANSWER :
D. Compost, Vermicompost and Green manure
9.
What is COMPOST and how is it prepared?
A.
Compost is prepared by burning farm waste at high temperatures
B.
Compost is chemically produced by dissolving NPK salts in water
C.
Compost is prepared by grinding dry animal bones into powder
D.
Compost is organic manure prepared by decomposing farm waste materials (livestock excreta, vegetable waste, animal refuse, domestic waste, sewage, straw, weeds) in pits — the process is called composting
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ANSWER :
D. Compost is organic manure prepared by decomposing farm waste materials (livestock excreta, vegetable waste, animal refuse, domestic waste, sewage, straw, weeds) in pits — the process is called composting
10.
Which organisms are used to prepare VERMICOMPOST and what is the process called?
A.
Redworms (earthworms) are used; the process is called vermicomposting
B.
Blue-green algae are used; the process is called biofertilisation
C.
Bacteria and fungi are used; the process is called putrefaction
D.
Beetles and dung flies are used; the process is called dung fermentation
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ANSWER :
A. Redworms (earthworms) are used; the process is called vermicomposting
11.
VERMICOMPOST is considered superior to ordinary compost because:
A.
Vermicompost contains more harmful pesticide residues than ordinary compost
B.
Vermicompost is always cheaper to produce than chemical fertilisers
C.
Vermicompost is produced at high temperatures that kill all weed seeds
D.
Vermicompost is richer in nutrients, has a better texture, contains beneficial microorganisms, and is produced faster than ordinary pit composting
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ANSWER :
D. Vermicompost is richer in nutrients, has a better texture, contains beneficial microorganisms, and is produced faster than ordinary pit composting
12.
What is GREEN MANURE and what are the steps involved in its preparation?
A.
Green manure is prepared by mixing green food colouring with ordinary compost
B.
Green manure is any manure that appears green due to algae growing on it
C.
Green manure is prepared by growing green plants (like sun hemp/sunn hemp or guar) in the field and then ploughing them into the soil before sowing crop seeds, so they decompose in situ
D.
Green manure is collected from forests and purchased from nurseries
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ANSWER :
C. Green manure is prepared by growing green plants (like sun hemp/sunn hemp or guar) in the field and then ploughing them into the soil before sowing crop seeds, so they decompose in situ