Chapter:

Microbes-in-Human-Welfare

Which of following statements is/are incorrect ?
(i) Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial habitats.
(ii) Anabaena, Nostoc and Oscillatoria are photosyntic - fixing cyanobacteria.
(iii) Tolypothrix (BGA) can increase rice production by about 20%.
(iv) BGA add organic matter to soil and increase its fertility.
(v) In our country, fertilizers are not available commercially in markets for farmers.