Natural cycles and decomposition - Edexcel The nitrogen cycle

nitrogen cycle Nitrogen is taken up by plant roots and combined into organic substances in the plant, such as enzymes, proteins and chlorophyll Chlorophyll

A CONTINUAL PROCESS · Biological nitrogen fixation is the first step in the nitrogen cycle, occurring when atmospheric nitrogen is 'fixed' or converted into krebs cycle Nitrogen Cycle · The nitrogen cycle fixes the nitrogen from the atmosphere into the soil for use by plants and animals · They are then demineralized upon their