Which one of the following microbes forms a symbiotic association with plants and helps them in their nutrition?
1. Azotobacter
2. Aspergillus
3. Glomus
4. Trichoderma
A nitrogen-fixing microbe associated with Azolla in rice fields is:
1. Spirulina
2. Anabaena
3. Frankia
4. Tolypothrix
1. Rhizobium
2. Frankia
3. Anabaena
4. Glomus
1. Rhizobium
2. Nostoc
3. Mycorrhiza
4. Agrobacterium
The common nitrogen-fixer in paddy fields is:
1. Rhizobium
2. Azospirillum
3. Oscillatoria
4. Frankia
Which one of the following is not used in organic farming?
1. Glomus
2. Earthworm
3. Oscillatoria
4. Snail
An example of endomycorrhiza is:
1. Glomus
2. Agaricus
3. Rhizobium
4. Nostoc