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
Air movements at tropical latitudes Let us now explain air movements at tropical latitudes. The surface air that rushes to fill the equatorial void from the north is deflected

HEARIN G  - Sound waves struck ear drum, it starts vibrations, these vibrations are carried to MIS → f. ovalis → S. vestibule →  Hellicotrema → S. Tympani → f. rotundus → mi

Prophase This is the first and longest phase of mitosis .At its beginning  all  10 nm segments   of chromatids (= chromonemata)  of the  duplicated  chromatin fibres of interph

Define interaction of vitamin c with Nicotinic acid? NAD, NADP and NMN act as constituents of the hydrogen transferring coenzymes in glycolysis, Kreb's cycle and in the oxidati

Examination of the Prosthesis It is important to examine the prosthesis thoroughly.  This involves assessing mobility, checking screws, evaluating attachments and porcelain res

What is the pineal gland? The pineal gland, also called as pineal body or epiphysis, is situated centrally in the head. It secretes the hormone melatonin, a hormone formed at n

What are the multiple alleles? is there dominance in multiple alleles? The Multiple alleles is the phenomenon in which the similar gene has more than two different alleles (in

Carboxymethyl Cellulose (CMC) CMC is a linear, long-chain, water-soluble, anionic modified polysaccharide. It is a derivative of cellulose formed by its reaction with alkali an

State the Diagnosis and prevention of VIBRIO PARAHAEMOLYTICUS Diagnosis: Diagnosis of gastroenteritis caused by this organism is made by  culturing the organism from the diarrh

Define Key Concepts and Facts on Properties of Monosaccharides? 1. All monosaccharides are soluble in water. 2. All monosaccharides give Molisch's test. 3. Monosaccharides do n