Which one of the following is not used in organic farming?

To increase the production of soybean crops,$..........$ is used as a biofertilizer.

The main sources of biofertilisers are

Which of the following acts as a biofertilizer in paddy fields?

An example of endomycorrhiza is

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.