Holiday Weather. Less rain and more sun is the main theme during the third month of the year, and a very popular time to visit Madrid, as the fleeting spring season begins. You can expect an average temperature of around 10Â°C during March, which actually reaches a very pleasant 16Â°C on a good day, and goes down to an average low of 4Â°C in th...
The nitrogen cycle is the process by which nitrogen is converted from organic to inorganic forms; many steps are performed by microbes. Learning Objective. Key Points. Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation.
Step 1- Nitrogen Fixation-Special bacteria convert the nitrogen gas (N 2) to ammonia (NH 3) which the plants can use.  Step 2- Nitrification-Nitrification is the process which converts the ammonia into nitrite ions which the plants can take in as nutrients.