Question

Who reported the presence of associative nitrogen fixing bacteria with the roots of maize plants?

• A. P. K. De
• B. G. C. Fogg
• C. J. Doberiner
• D. N. J. Borlaug

Answer 1

The correct option is A P. K. De

Appreciable work has been done by P. K. De, Uppal et al. and Chaudhuri H. on the fixation of nitrogen by blue-green algae in rice soil. Further work by Watanabe et. al. revealed that some specific algae fix nitrogen in rice soil. Watanabe showed that a few species, for example, Tolypothrix tenius, Calothrix brevissima and Anabaenopsis sp. seemed to have greater ability to fix atmospheric nitrogen than the usual blue-green algae.