It has been found that a low moisture level in the environment reduces the activity of microbial enzymes. Explain why the rate of nitrate formation in soil is expected to be lowest during dry summers.

Water is critical in all life. This is because it is important in the biochemical process of the cell. Take an example; water is consumed in most hydrolysis reaction in the body and is also significant in the regulation of blood pressure. Therefore even microbial activity will be reduced during water scarcity. Subsequently, nitrification process by nitrifying bacteria will definitely reduce in dry summers.