Non symbiotic nitrogen fixers - nutrient cycles, Biology

Assignment Help:

Non Symbiotic Nitrogen Fixers - Nutrient Cycles

There are certain groups of free living bacteria both aerobic and anaerobic and blue green algae that fix nitrogen. Aerobic nitrogen fixing bacteria such as Azotobacter and anaerobic form Clostridium are widely distributed in soils as well as in fresh and marine waters. In fact accumulating evidence indicates that many soil and water bacteria are capable of nitrogen fixation and because they occur in abundance the total amount of nitrogen fixed is considerable. The N2 fixed in the soil and root nodules is used by the plants to form numerous nitrogenous compounds mainly proteins which then enter the food chain. Nitrogen is returned to the soil in the form of organic compounds through manure, dead plants, and animals and micro-organism. But most of this nitrogen is insoluble and not immediately available for plant use. The organic nitrogenous compounds have to be changed to inorganic compounds to be used by plants. This is done by two processes - ammonification and nitrification.


Related Discussions:- Non symbiotic nitrogen fixers - nutrient cycles

Procedures for diagnosis - electron microscopy, Direct demonstration of the...

Direct demonstration of the causative agent by electron microscopy (EM): Where facilities for electron microscopy are available and a viral disease is suspected, presence o

Calorie value, THE CALORIE VALUE - The amount of heat liberated fr...

THE CALORIE VALUE - The amount of heat liberated from complete combusion of 1gm food in a bomb caloriemeter (a closed metal chamber filled with O ) is its gross calorific

Name the interstitial spaces of the kidney medulla, Select the processes as...

Select the processes assist in the maintenance of high levels of dissolved solutes in the interstitial spaces of the kidney medulla? A. Net flux of sodium ions from intracellul

Comparison between regeneration and embryonic development, Comparison betwe...

Comparison between Regeneration and Embryonic Development By now you must have realized that the procedures of regeneration and embryonic development have several fundamental

Complete blood count, One may find leucocytosis with predominant polymorpho...

One may find leucocytosis with predominant polymorphonuclear cellular response in patients of ARF in presence of acute some throat. Throat Culture When patient presents as AR

What are alkalosis and acidosis, Q. What are alkalosis and acidosis? Ac...

Q. What are alkalosis and acidosis? Acidosis is the condition in which the blood pH is abnormally low Alkalosis is the condition in which the blood pH is abnormally high Normal

Illustrate the aqueous phase in sol processing, Illustrate the aqueous phas...

Illustrate the aqueous phase in sol processing In a sol possessing a continuous aqueous phase, the colloidal particles have an electrically charged surface.  The ionized groups

Why is the determination of the blood types of the donor, Why is the determ...

Why is the determination of the blood types of the donor and of the recipient important in transfusions? The Red blood cells have different antigens in the outer surface of the

How do bones grow, Q. How do bones grow? Bones form and develop through...

Q. How do bones grow? Bones form and develop through a process known as ossification. There are two types of ossification: endochondral ossification and intramembranous ossific

Micro-organisms, Micro-organisms: The micro-organisms mixed up i...

Micro-organisms: The micro-organisms mixed up in aerobic absorption and their activities are the same as those found in nature. The organic compounds are oxidised to H

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd