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.
1 The Haber process converts nitrogen gas into ammonia used in fertilizers. 2  Ammonia is converted to nitrates by nitrifying bacteria in the soil. 3  Plants absorb nitrates from the soil and use these to build up proteins. 4  The plant may be eaten by an animal, and its biomass used to produce animal protein.