Which of the following helps plants in the absorption of phosphorus from the soil?

Biofertilizers include:

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

$A$ farmer has applied chemical fertilisers in his crop field for many successive seasons. In the next season,the crop growth was poor as the soil lost its fertility. Suggest the suitable micro-organisms that replenish the fertility of the soil in his field.

Which of the following is a bacterium used as a biofertilizer?

In $1885$,Frank discovered . . . . . . .