. Which of the following is/are used as biofertilizers? 1. Azolla 2. Blue-green algae 3. Alfalfa Select the correct answer using the codes given below: Codes: (a) 1 alone (b) 1 and 2 (c) 1 and 3 (d) 1, 2 and 3
1 12151Post New Environment General Knowledge_Current Affairs Interview Questions
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