The branch of science that studies the biological, chemical, and geological aspects of environmental processes: Biogeochemistry deals with the relation of chemicals found in the soil to living organisms. It is the biological application of geochemistry.

Biogeochemistry is the study of the influence of living organisms and life processes on the chemical structure and history of the Earth.

Biogeochemistry also includes the study of the interactions between the biosphere and its mineral environment, for example, the study of the effect of living organisms on the weathering of rocks and of the concentration of elements by living systems.