Non symbiotic nitrogen fixers - nutrient cycles, Biology

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.

Posted Date: 1/19/2013 2:12:18 AM | Location : United States







Related Discussions:- Non symbiotic nitrogen fixers - nutrient cycles, Assignment Help, Ask Question on Non symbiotic nitrogen fixers - nutrient cycles, Get Answer, Expert's Help, Non symbiotic nitrogen fixers - nutrient cycles Discussions

Write discussion on Non symbiotic nitrogen fixers - nutrient cycles
Your posts are moderated
Related Questions
Plot the amount of DNA in the nucleus of a spermatogonia from the G1 stage prior to the first meiotic division through the completion of meiosis. Label each of the major stages of

How do sponges try to protect themselves against harm from the environment? Is that method efficient or rudimentary? Sponges can close their pores to avoid the entrance of wate

What is Centrioles in cell structure? Most cells of higher organisms contain pairs of cylindrical bodies called centrioles, which help to organize microtubules in cell division

Class Hirudinea - Classification of Coelom These are leeches. Number of body segments of these types of animals is fixed; usually there are 34 segments in a few groups there m

The sewage treatment methods can be classified into the following heads: Primary treatment Secondary treatment Tertiary treatment 1. Primary Treatment: The primary

Q. What is the cyclosporin? How are fungi related to this substance? Cyclosporin is a drug discovered in the 1970's that revolutionized organ transplantation in Medicine, It is

List three important discoveries that resulted from the Human Genome Project. Answers should contain three of the following: Only about 2 percent of the human genome encodes p

Why are heterotrophic, autotrophic , and mixotrophic protists not classified as plants or animals ?

Explain Development of excretory system? The filtration rate of kidney is low and infants find it difficult to eliminate high concentration of solutes. However, by the end of t

Q. What do you mean by Ventricular Arrhythmias? Considerable disagreement exists regarding the significance of resting ventricular ectopic beats. In study comparing the coronar