Which among the following statements about bio fertilizers are correct ? . 1. Azotobacter is one of the Nitrogen fixing bacteria used as a bio fertilizer. 2. They have to be applied to the leaves of the plant only. 3. They alter the chemical composition o

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Q: 24 (CDS-II/2010)
Which among the following statements about bio fertilizers are correct ? .
1. Azotobacter is one of the Nitrogen fixing bacteria used as a bio fertilizer.
2. They have to be applied to the leaves of the plant only.
3. They alter the chemical composition of the soil.
4. They can be used along with organic fertilizers.

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question_subject: 

Science

question_exam: 

CDS-II

stats: 

0,69,40,69,17,4,19

keywords: 

{'bio fertilizers': [0, 0, 1, 0], 'bio fertilizer': [0, 0, 1, 0], 'organic fertilizers': [1, 0, 1, 1], 'azotobacter': [0, 0, 2, 0], 'nitrogen': [1, 1, 0, 2], 'soil': [7, 0, 4, 7], 'bacteria': [4, 1, 2, 3], 'chemical composition': [0, 0, 1, 2]}