290 GLOSSARY
Craig-Geff en-Morse method: A method for predicting oil recovery
by water flood.
Cropland: Total cropland includes five components: cropland harvested, crop failure, cultivated summer fallow, cropland used
only for pasture, and idle cropland.
Cropland pasture: Land used for long-term crop rotation.
However, some cropland pasture is marginal for crop uses and
may remain in pasture indefinitely. This category also includes
land that was used for pasture before crops reached maturity
and some land used for pasture that could have been cropped
without additional improvement.
Crude oil: See Petroleum.
Cull tree: A live tree, 5.0 inches in diameter at breast height (dbh)
or larger that is non-merchantable for saw logs now or prospectively because of rot, roughness, or species. (See definitions for
rotten and rough trees.)
Cultivated summer fallow: Cropland cultivated for one or more
seasons to control weeds and accumulate moisture before small
grains are planted.
D
Delayed coking: A coking process in which the thermal reactions
are allowed to proceed to completion to produce gaseous,
liquid, and solid (coke) products.
Density: The mass (or weight) of a unit volume of any substance at
a specified temperature; see also Specific gravity.
Desulfurization: The removal of sulfur or sulfur compounds from
a feedstock.
Development well: A well drilled within the proved area of an oil
or gas reservoir to the depth of a stratigraphie horizon known
to be productive.
Diesel engine: Named for the German engineer Rudolph Diesel,
this internal-combustion, compression-ignition engine works
by heating fuels and causing them to ignite; can use either
petroleum or bio-derived fuel.
Diesel fuel: A distillate of fuel oil that has been historically derived
from petroleum for use in internal combustion engines; also
derived from plant and animal sources.
Diesel, Rudolph: German inventor famed for fashioning the diesel
engine, which made its debut at the 1900 World's Fair; initially
engine to run on vegetable-derived fuels.
Craig-Geff en-Morse method: A method for predicting oil recovery
by water flood.
Cropland: Total cropland includes five components: cropland harvested, crop failure, cultivated summer fallow, cropland used
only for pasture, and idle cropland.
Cropland pasture: Land used for long-term crop rotation.
However, some cropland pasture is marginal for crop uses and
may remain in pasture indefinitely. This category also includes
land that was used for pasture before crops reached maturity
and some land used for pasture that could have been cropped
without additional improvement.
Crude oil: See Petroleum.
Cull tree: A live tree, 5.0 inches in diameter at breast height (dbh)
or larger that is non-merchantable for saw logs now or prospectively because of rot, roughness, or species. (See definitions for
rotten and rough trees.)
Cultivated summer fallow: Cropland cultivated for one or more
seasons to control weeds and accumulate moisture before small
grains are planted.
D
Delayed coking: A coking process in which the thermal reactions
are allowed to proceed to completion to produce gaseous,
liquid, and solid (coke) products.
Density: The mass (or weight) of a unit volume of any substance at
a specified temperature; see also Specific gravity.
Desulfurization: The removal of sulfur or sulfur compounds from
a feedstock.
Development well: A well drilled within the proved area of an oil
or gas reservoir to the depth of a stratigraphie horizon known
to be productive.
Diesel engine: Named for the German engineer Rudolph Diesel,
this internal-combustion, compression-ignition engine works
by heating fuels and causing them to ignite; can use either
petroleum or bio-derived fuel.
Diesel fuel: A distillate of fuel oil that has been historically derived
from petroleum for use in internal combustion engines; also
derived from plant and animal sources.
Diesel, Rudolph: German inventor famed for fashioning the diesel
engine, which made its debut at the 1900 World's Fair; initially
engine to run on vegetable-derived fuels.