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Which of the following options includes biofertilizers?
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17/12/2021 6:18 pm
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Which of the following options includes biofertilizers?
(a) cow dung manure and farmyard waste
(b) A quick growing crop ploughed back into the field
(c) Nostoc, Oscillatoria
(d) All of these
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17/12/2021 6:19 pm
Correct answer: (c) Nostoc, Oscillatoria
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