Green manure plants are

• Poaceae

• Solanaceae

• Leguminosae

• Compositae

Azolla is used as a biofertilizer as it possesses

• humus in large quantities

• rhizobium

• mycorrhiza

• cyanobacteria

This chemical fertilizer is essential for better rhizobial nitrogen fixation

• calcium

• potassium

• sodium

• phosphorus

This is not included in organic farming

• crop rotation

• chemical fertilizer

• green manures

• compost and farmyard manures

For paddy, the best fertilizer is

• Bacillus polymyxa

• Bacillus megaterium

• Azolla pinnata

• Rhizobium meliloti

Identify

• Azolla

• Rhizobium

• Nostoc

• Cyanobacteria

Identify

• Blue Green Algae

• Azolla

• Bacteria

• Fungi

Nostoc form

• compound colony

• simple colony

• both (a) and (b)

• None of these

Identify

• Inoculation needle

• scalpel

• Inoculation loop

• Inoculation blade

Identify the bacteria

• Cyanobacteria

• Azolla

• Nostoc

• Rhizobium with root nodule