Which of the following is not a biofertilizer?

Which organism is used as a biofertilizer in the cultivation of soybean crops?

Which of the following is common to Azospirillum,Anabaena,Nostoc and Oscillatoria?

Identify the correct statements regarding mycorrhiza:
$(1)$ Many members of the genus $Glomus$ form mycorrhiza.
$(2)$ It is responsible for all mineral absorption from the soil.
$(3)$ Such associations show benefits against drought and salinity in plants.
$(4)$ Mycorrhiza is a symbiotic association between fungi and roots of higher plants.

Which of the following plants is used as a biofertilizer?

The nitrogen-fixing microorganism associated with $Azolla$ in rice fields is .......