Consider the following organisms:

1. Agaricus

2. Nostoc

3. Spirogyra 

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

Which of the following adds/add nitrogen to the soil? 1. Excretion of urea by animals 2. Burning of coal by man 3. Death of vegetation Se... UPSC CSE 2013 Prelims · Science and Technology Which of the following statements with regard to GenomeIndia Project is/are correct?1. It is a part of the Human Genome Project. 2. The p... UPSC CSE 2026 Prelims · Science and Technology Assertion (A): GSAT-24 was launched aboard the French Ariane-5 rocket. Reason (R): India currently lacks a launch vehicle capable of plac... JKPSC JKAS 2022 Prelims · Science and Technology The extraction of aluminum is carried out by which of the following processes? JKPSC JKAS 2022 Prelims · Science and Technology Fruits stored in a cold chamber exhibit longer storage life because UPSC CSE 2013 Prelims · Science and Technology