Glossary
- PDMPsearch for term
- Pesticide Discharge Management Plan – demonstrates integrated pest management strategies and documents steps taken to reduce pesticide discharges to water of the U.S.
- peatsearch for term
- Partially carbonized vegetative tissue formed by the partial decomposition in water of various plants.
- periphytonsearch for term
- Organisms (such as some algae) that live attached to underwater surfaces.
- personal protective equipment (PPE)search for term
- Devices and garments that protect handlers from exposure to pesticides. These include coveralls, eye protection, gloves, boots, respirators, aprons and hats.
- phosphoroussearch for term
- A nonmetallic element that occurs widely especially as phosphate fertilizers.
- photic zonesearch for term
- The layer of a body of water penetrated by sufficient sunlight for photosynthesis.
- photolysissearch for term
- Breaking down in sunlight. Synonyms: photodegradation
- phytotoxicsearch for term
- Poisonous to plants.
- pioneeringsearch for term
- To open or prepare for others to follow. The first instance of a plant species.
- planktonsearch for term
- The floating organisms occurring in a body of water, primarily made of microscopic algae and protozoa.
- pneumataphoressearch for term
- A submerged or exposed root often functioning as a respiratory organ in swamp or marsh plants (Example: a cypress knee).
- potable watersearch for term
- Water which is fit for consumption for humans and other animals. Drinking water.
- ppbsearch for term
- Parts per billion.
- precipitationsearch for term
- Falling out of solution and sinking to the bottom.
- prescribed firesearch for term
- Fire applied in a knowledgeable manner to vegetative fuels on a specific land area under selected weather conditions to accomplish predetermined, well-defined management objectives.
- propagulesearch for term
- Vegetative or sexual structures with the ability to create new plants; examples include turions, tubers, bulblets, fragments, winter buds and seeds.
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