Loading...
UPSC 2013: 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
Attempt This Question
Not attemptedCorrect Answer: (b) 2 only
Nostoc is a nitrogen-fixing cyanobacterium widely used as a biofertilizer in paddy fields. Agaricus is an edible mushroom with no nitrogen-fixing ability, and Spirogyra is a green alga not employed as a biofertilizer. Therefore only organism 2 qualifies, making option (b) correct. ([edukemy.com](https://edukemy.com/blog/upsc-prelims-2013-question-83/?utm_source=openai))
Related UPSC Questions
More from Sustainable Agriculture & Forestry
2013moderate
Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to 1. resist drought and increase absor
2014moderate
What are the significances of a practical approach to sugarcane production known as 'Sustainable Sugarcane Initiative'? 1. Seed cost is very low in th
2014moderate
Every year, a month-long ecologically important campaign/festival is held during which certain communities/tribes plant saplings of fruit-bearing tree
Related Environment & Ecology Topics
2013Water & Wetland Conservation
Which of the following can be found as pollutants in the drinking water in some parts of India? 1. Arsenic 2. Sorbitol 3. Fluoride 4. Formaldehyde 5.
2013Protected Areas & Wildlife
Consider the following pairs: 1. Nokrek Biosphere Reserve : Garo Hills 2. Loktak Lake : Barail Range 3. Namdapha National Park : Dafl
Frequently Asked Questions
What is the correct answer to this UPSC 2013 Environment & Ecology question?▼
The correct answer is option (b): 2 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Sustainable Agriculture & Forestry question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2013, GS Paper 1, as Question 33. It falls under Environment & Ecology > Sustainable Agriculture & Forestry.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Sustainable Agriculture & Forestry?▼
UPSC has asked 31 questions from Sustainable Agriculture & Forestry (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.