Environmental Engineering Reference
In-Depth Information
Glossary
Acidic:
Having a pH of less than 7.0.
Active ingredient:
In a pesticide formulation, the material that actually
destroys the target pest or performs the desired function.
Aeration:
The exchange of gases between the soil and the atmosphere.
Aerification:
The process of disturbing the soil by mechanical means to
relieve compaction and maximize air, water and nutrient availability to
turf-grass.
Aerification, hollow-tine:
The creation of vertical channels in the soil
by means of hollow cylinders that physically remove cores of turf and
soil to a specified depth; also referred to as 'core aeration'.
Aerification, solid-tine:
The creation of vertical channels in the soil by
displacement, without physical removal of cores.
Aggregate:
A soil structure made up of many soil particles held to-
gether in a single mass or mineral material of uniform fine size used in
construction projects.
Alkaline:
Having a pH higher than 7.0.
Annual:
A plant that completes its life cycle within one growing season.
Application, post-emergent:
Application of herbicides, to plants that
have already germinated and emerged from the soil.
