Environmental Engineering Reference
In-Depth Information
Cultivar:
A variety or subdivision of a plant species that, on the basis of
morphology or performance characteristics, can be distinguished from
other plants within that species.
Curative control:
Application of a pesticide after the outbreak of dis-
ease or infestation, as opposed to preventive application.
Desiccation:
The withering of plant tissues due to acute lack of mois-
ture.
Divot:
A piece of turf torn up by a golf club as it strikes the ball.
Divot opening:
The scar on the turf surface that results from formation
of a divot.
Drain, French:
Strictly speaking, drainage trench filled with stone or
gravel, containing no pipe.
Emulsifiable concentrate:
A pesticide formulation that consists of one
liquid suspended in another, usually an oil-based pesticide carrier sus-
pended in water.
Evapotranspiration:
The loss of water from the soil through a combin-
ation of evaporation from the surface and transpiration through plants.
Fertilizer analysis:
Percentages by weight of nitrogen, phosphate and
potash in a fertilizer product.
Fertilizer, natural organic:
A nutrient source of plant or animal origin,
typically with low nutrient analysis and requiring soil microbial activity
to convert nutrients to plant-available forms.
Fertilizer, synthetic organic:
A chemically engineered carbon-based
nutrient source.
Field capacity:
The upper limit of storable water in a field layer after the
water has drained through as a result of gravity.
Foliar absorption:
Uptake of nutrients through the stomata and cracks
in the leaf cuticle.
Foliar feeding:
Application of nutrients to the leaves, for foliar absorp-
tion.
Fumigant:
A gaseous pesticide.
Fungicide:
A pesticide used to control fungi.
Growing points:
The portions of a plant where new tissues form; also
known as meristematic zones.
Herbicide:
A pesticide used to control unwanted vegetation.
