Yahoo India Web Search

Search results

  1. People also ask

  2. Nitrogen & Phosphorus Cycles: Always Recycle! Part 2 - Crash Course Ecology #9. CrashCourse. 15.7M subscribers. 1.6M views 11 years ago. ...more. Hank describes the desperate need many...

    • 9 min
    • 1.7M
    • CrashCourse
    • Nitrogen Fixation Process
    • Recommended Video
    • Nitrification
    • Assimilation
    • Ammonification
    • Denitrification

    It is the initial step of the nitrogen cycle. Here, Atmospheric nitrogen (N2) which is primarily available in an inert form, is converted into the usable form -ammonia (NH3). During the process of Nitrogen fixation, the inert form of nitrogen gas is deposited into soils from the atmosphere and surface waters, mainly through precipitation. The entir...

    Types of Nitrogen Fixation

    1. Atmospheric fixation:A natural phenomenon where the energy of lightning breaks the nitrogen into nitrogen oxides, which are then used by plants. 2. Industrial nitrogen fixation:It is a man-made alternative that aids in nitrogen fixation by the use of ammonia. Ammonia is produced by the direct combination of nitrogen and hydrogen. Later, it is converted into various fertilisers such as urea. 3. Biological nitrogen fixation: We already know that nitrogen is not used directly from the air by...

    In this process, the ammonia is converted into nitrate by the presence of bacteria in the soil. Nitrites are formed by the oxidation of ammonia with the help of Nitrosomonas bacteria species. Later, the produced nitrites are converted into nitrates by Nitrobacter. This conversion is very important as ammonia gas is toxic for plants. The reaction in...

    Primary producers – plants take in the nitrogen compounds from the soil with the help of their roots, which are available in the form of ammonia, nitrite ions, nitrate ions or ammonium ions and are used in the formation of the plant and animal proteins. This way, it enters the food webwhen the primary consumers eat the plants.

    When plants or animals die, the nitrogen present in the organic matter is released back into the soil. The decomposers, namely bacteria or fungi present in the soil, convert the organic matter back into ammonium. This process of decomposition produces ammonia, which is further used for other biological processes.

    Denitrification is the process in which the nitrogen compounds make their way back into the atmosphere by converting nitrate (NO3-) into gaseous nitrogen (N). This process of the nitrogen cycle is the final stage and occurs in the absence of oxygen. Denitrification is carried out by the denitrifying bacterial species- Clostridium and Pseudomonas, w...

    • 5 min
  3. Plants and animals need nitrogen to make proteins, which ...

    • 4 min
    • 450.3K
    • FuseSchool - Global Education
  4. Hank describes the desperate need many organisms have for nutrients (specifically nitrogen and phosphorus) and how they go about getting them via the nitrogen and phosphorus cycles.

  5. Course: Class 12 Biology (India) > Unit 13. Lesson 3: Nutrient Cycling. Biogeochemical cycles overview. The carbon cycle. The carbon cycle. The water cycle. The water cycle. The nitrogen cycle.

  6. (CrashCourse intro) So let's talk about the nitrogen cycle first, since nitrogen really is actually all around us, like I can feel it right now, there it is in the air. So why is it so hard to get this stuff that's constantly surrounding us in the air into our actual bodies to be useful for us?