Microbiology of Soils Questions

• Nitrogen fixation by the microorganisms can be detected by adopting the approach of
• Which of the following soil microorganism is involved in the reduction of sulfates to H2S?
• The nitrogenase consists of
• Denitrification may be distinguished as
• The organisms responsible for the characteristic musty or earth odor of a freshly plowed field is/are
• Most soil protozoa are flagellates or amoebas, having their dominant mode of nitrogen as
• Some microorganisms have the ability to increase the nitrogen content of soils, are called as
• A heterocyst is
• The diagnostic enzyme for nitrogen-fixing organisms is
• The groups of bacteria which have the ability to fix nitrogen from air to soil are
• The transformation of nitrates to gaseous nitrogen is accomplished by microorganisms in a series of biochemical reactions. The process is known as
• The population of algae in soil is __________ that of either bacteria or fungi.
• The nonsymbiotic bacteria which fix nitrogen live in the soil independently are
• For rapid decomposition by microbes, the substrate should have a C/N ratio of
• Degree of compost maturity can be assesed by
• Assimilative denitrification is done by
• The physical structure of soil is improved by the accumulation of
• In the process of nitrogen fixation, which of the following microorganism is involved?
• An example of a symbiotic nitrogen fixer is
• Which of the following microorganism use H2S as the electron donor to reduce carbon dioxide?