Protection of the soil against sediment loss by erosion or fertility loss due to degradation. / A combination of all soil management and land use methods that protect against degradation.

The branch of soil science that deals with the chemical properties, constituents and reactions within soils.

The subdiscipline of soil science that studies chemical reactions, activities and products of soil microorganisms.

The mode of soil formation.

The sum total of all operations, practices and treatments used to protect soil and enhance its performance.

The subdiscipline of soil science that studies the functions and activities of soil-based microorganisms.

The subdiscipline of soil science that studies the solid inorganic phases controlling physicochemical processes in soils and sediments.

The sub-discipline of soil science that studies the physical properties of the soil, with particular emphasis on soil moisture potential, water movement and solute transport.

A scientist who studies soil as a component of natural and man-made systems.

The subdiscipline of soil science that deals with the systematic categorization of soils based on distinguishing characteristics developed during soil genesis as well as criteria that dictate choices in land use and soil management.