The denitrification means

  • A

    Reduction of $NO_2$ to ammonia form by bacteria in the soil

  • B

    Oxidation of ammonia to nitrate form

  • C

    Conversion of ammonia to amino acids

  • D

    Conversion of ammonia and nitrates to gaseous nitrogen in the soil

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Which of the following is the first fungicide

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Match List $ - I$ with List $- II$

List $ - I$ List $ - II$
$(a)$ Aspergillus niger $(i)$ Acetic Acid
$(b)$ Acetobacter aceti $(ii)$ Lactic Acid
$(c)$ Clostridium butylicum $(iii)$ Citric Acid
$(d)$ Lactobacillus $(iv)$ Butyric Acid

Choose the correct answer from the options given below.

$(a) -(b)- (c)- (d)$

  • [NEET 2021]

In maize, hybrid vigour is exploited by

Which one is green manure/biofertilizer