Question

some farmers were seen adding a type of algae to barren field to support crop growth . which algae could they be using ?

Answer 1

Blue green algae

Explanation:

These algae are used to increase the fertility of soil

Answer 2

These farmers could possibly be using Blue-green algae, especially Cyanobacteria to barren field to support the growth.    

Explanation:

• The farmers could possibly be using Blue-green algae, especially Cyanobacteria to the barren land to increase the soil fertility, which further increases the crop yield.

• Blue-green algae are nitrogen fixing bacteria which converts atmospheric nitrogen into absorbable forms which are taken up by the plants to fulfill their nutritional requirements.

• Henceforth, it helps to enhance the soil fertility thus increasing the crop yield.