Question

Write two advantages of Blue-green algae in farming.

Answer 1

• Cyanobacteria such as Anabaena, Nostoc, Plectonema and other procaryotic non-symbiotic organisms are involved in atmospheric nitrogen fixation. Blue-green algae have a very special cell called as Heterocyst. 
• Nif gene present in heterocyst does the nitrogen fixation. An environment of Rice field is ideal for the growth of blue-green algae: Use of blue-green algae in paddy fields increases production