UPSC 2013 › Environment & Ecology › Sustainable Agriculture & Forestry

2 questions · 2013 · answers as per the UPSC key

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All years of Sustainable Agriculture & Forestry · Full UPSC 2013 paper
UPSC 2013 · Q33 · Environment & Ecology › Sustainable Agriculture & Forestry · Save

Consider the following organisms:

  1. Agaricus
  2. Nostoc
  3. Spirogyra

Which of the above is/are used as biofertilizer/biofertilizers?

(a) 1 and 2
(b) 2 only
(c) 2 and 3
(d) 3 only
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Answer: (b) 2 only
UPSC 2013 · Q97 · Environment & Ecology › Sustainable Agriculture & Forestry · Save

Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to

  1. Resist drought and increase absorptive area
  2. Tolerate extremes of pH
  3. Resist disease infestation

Select the correct answer using the codes given below:

(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
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Answer: (d) 1, 2 and 3