Organisms that obtain their food directly from living bodies of
other organisms. Parasites vary greatly in the amount of damage
they inflict upon the host organism.
An organism that causes disease.
Unconsolidated material consisting largely of non-decomposed or
slightly- decomposed organic matter accumulated under conditions
of excess moisture.
A measure of the rate with which air, roots, and water penetrate
perennial grasses -
Lasting or continuing from year to year in areas where
An agent used to control pests such as weeds, insects, or
A numerical measurement of the hydrogen ion concentration. The
measurement indications of the relative acidity or alkalinity.
Values below 7 are increasingly acid; values above 7 are
Harmful to plants.
The vegetative propagation of turfgrass by means of plugs or
small sod pieces. A method of establishing vegetatively
propagated turfgrasses, as well as repairing damaged area.
Using a long (bamboo or fiberglass) switch or pole to remove dew
and exudations from a turf by switching the pole in a wide arc
while it is in contact with the turf surface. Also used in
breakup of clumps of clippings and earthworm casts. The practice
is usually confined to putting greens.
pore space -
The space between solid soil particles or aggregates that is
normally filled with water, air, or grass roots.
porosity, soil total -
The degree to which the soil mass is permeated with pores or
cavities. The porosity is the sum of the capillary and
non-capillary porosity values.
porosity, capillary -
The percentage of pores in a soil or root zone mixture that
retain water after free drainage. This also is occasionally
referred to as water-filled porosity.
porosity, non-capillary -
The large pores in a soil or root zone mixture that are filled
with air after free drainage. Also referred to as air-filled
Term used in reference to treatments,
herbicide treatment made after weed seedlings have emerged from
potable water -
Water that is at a quality level fit for drinking.
practice green -
A putting green area usually constructed in close proximity to
the clubhouse for the purpose of allowing golfers to practice.
This green should be representative of the regular greens so that
golfers can develop a touch for play on the golf course
Term used in reference to treatments,
treatment made before weed seedlings emerge from the soil.
profile, soil -
A cross-section of soil that shows the layers or horizons.
putting green -
The area of the hole being played that is specially prepared for
putting or otherwise defined as such by the Committee. A ball is
deemed to be on the putting green when any part of it touches the
putting green. Putting greens are often mowed between 1/8
of an inch, depending upon the turf quality desired.
A term that refers to practices involving complete changes in the
total turf area,
reconstruction of a green, tee, fairway, rough or any other area
of the golf course.
recycled / reclaimed / reuse water -
A water source not considered of potable quality that has been
used for another purpose prior to use as irrigation. Recycled
water can include, but is not limited to, treated residential or
industrial sewerage effluent, storm runoff and/or recaptured
irrigation runoff. These water sources often contain higher
quantities of salts than groundwater or potable sources. Recycled
water is the preferred terminology.
Turf improvement involving replanting into existing live and/or
residual period -
The period during which a chemical substance retains its
residual sodium carbonate (RSC)-
A formula used to determine the need for acidification of
irrigation water (either acid injection or sulfur burner water
treatments). Total levels of magnesium and calcium are subtracted
from total levels of carbonate and bicarbonate contained in
irrigation water. RSC values of less than 1.25 are generally safe
for irrigation; 1.25 - 2.5 is considered marginal, and greater
than 2.5 is usually unsuitable unless treated.
the capability of the turf to spring back when balls, shoes, or
other objects strike the surface, thus providing a cushioning
An underground, root-like stem; underground creeping stem; a root
Usually referred to as the turfgrass area immediately adjacent to
and on either side of the fairway. In terms of maintenance,
roughs are usually mowed at heights between 1.5 to 2 inches for
daily play and up to 4 inches for tournament play.
a disease caused by a rust fungus or the fungus itself.< Back