The diagram below shows a simplified schematic of the terrestrial nitrogen cycle, detailing six arrows representing biochemical and ecological processes.
Name the biological process represented by each of the following arrows:
Name two main groups of saprobiotic organisms that drive the process of decomposition represented by Arrow 6.
Describe the journey of nitrogen from nitrate ions in the soil (Box R) to becoming part of a protein molecule inside a consumer (Box T).
Farmers often grow leguminous cover crops (such as alfalfa or clover) between food crops and plough them back into the soil. Suggest two advantages of this agricultural practice over using synthetic inorganic chemical fertilizers.
