Which one is a nonsymbiotic nitrogen fixer
Rhizobium
Oscillatoria
Nostoc
Lactobacillus
Which of the following can use molecular nitrogen as nutrient
Mycorrhiza is a symbiotic association between
Which of the following is common to Azospirillum, Anabaena, Nostoc and Oscillatoria
Aquatic fern which is an excellent biofertilizer
What are biofertilizers ? Give two examples.