Nitrogen fixation, Biology

Nitrogen Fixation

Nitrogen is an essential constituent of living organisms and there is an inexhaustible supply of it in the atmosphere in the free form. Majority of living organisms including humans are incapable of utilising gaseous nitrogen but need organic nitrogen for their nutrition. It is for this reason that the nitrogen fixation or availability of organic nitrogen is critical for the living organisms. Free nitrogen is inert but certain groups of specialised organisms have the ability to utilise gaseous nitrogen fmn the atmosphere. The reduction of gaseous nitrogen or its conversion to organic nitrogen is called nitrogen fixation. The fixed nitrogen is readily utilised by other organems. Incorporation of atmospheric nitrogen into nitrogen compounds by nitrogen fixers such as Azotobacter in aerated soils; Clostridium in unaerated soils; Rhizobium in the nodules of legume roots and by a number of blue green algae such as Nostoc and Anabaena, is the most important step to ensure nitrogen supply for the living organisms. The quantum of biological nitrogen-fixation has direct effect on soil fertility.

Posted Date: 12/11/2012 2:46:56 AM | Location : United States







Related Discussions:- Nitrogen fixation, Assignment Help, Ask Question on Nitrogen fixation, Get Answer, Expert's Help, Nitrogen fixation Discussions

Write discussion on Nitrogen fixation
Your posts are moderated
Related Questions
Name the four organisms which are currently in danger of extinction because of human activities?

Define Criteria for Assessment of Niacin Status? Niacin status can be monitored by daily urinary excretion of methylated metabolites, especially the ratio of the 2-pyridone to

Does the trend of the change in shape of the graph as temperature increases differ when a different gas is examined?

What are the antigens and the respective antibodies of the ABO blood group system? The ABO blood system contains the erythrocytic antigens A and B that can be attacked by the a

How do the availability of water and light and the climate affect the growth of a population? The availability of water and light and the climate are abiotic factors that limi

Q. Can you explain Cholera? Cholera is one of the diseases which had caused epidemics all over the world. The organism which causes the disease is Vibrio cholerae. It is an

Imagine a population evolving by genetic drift in which the frequency of allele K is 0.65. What is the probability that at some point in the future allele K will drift to a frequen

What are the approaches to the design of retaining walls? The approach to the design of retaining walls can be started as follows: a. Chosse a trial dimension of the wall


Types of overpopulation - People overpopulation People overpopulation refers to a situation where there are more people than the supplies of food, water and other vital resour