What are biofertilizers ? Name two sources of biofertilizers.

Define biofertilizers.

What are biofertilizers ? What are the main sources of biofertilizers ?

What are biofertilizers ? Give two examples.

Name a source of emf.

What are biofertilizers ? Why are biofertilizers preferred to chemical fertilizers ?

What are biofertilizers? Name two organism which fix nitrogen asymbiotically and two organisms with fix symbiotically.

name two sources of vitamin B1?

Name one source of vitamin K?