a. The name of the process that converts atmospheric nitrogen into a form that can be used by plants is A and the bacteria that bring about this process are found in B and The chemical compound produced in this process is b. Lightening can convert atmospheric nitrogen to , a form can be used by plants. The nitrogen from animal waste is recycled back in nature by a process known as F c. The main difference between the P cycle and both C and N cycles is G The main source of phosphorous in the P cycle is/are