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Ramicorns
-
Abnormally large branches that project at sharp
acute angles from the bole and are persistent (often associated
with previous weevil attack).
Refill Planting
-
see Fill Planting
Reforestation
-
Re-establishing a forest on an area where trees have been removed.
Regeneration
-
The process by which the forest is replaced or renewed. This may be:
- a) Artificial Regeneration Ñ by means of seeding or planting.
- b) Natural Regeneration Ñ from natural seeing or sprouting. This term may also be used to describe the young crop itself.
Regeneration Class
-
The area, and the young trees in the
area, being managed during the regeneration interval in the shelterwood
silvicultural system. In this interval old and young trees occupy
the same area, young being protected by the old.
Regeneration Cut
-
Any removal of trees intended to assist
regeneration already present or to make regeneration possible.
Regeneration Initiation
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The year in which the new crop
is deemed to be started at an acceptable stocking level, whether
by planting, natural or artificial seeding, or by vegetative means.
Regeneration Interval
-
The period between the seed cutting
and the final cutting on a particular area under one of the shelterwood
systems.
Regeneration Period
-
The time between the initial regeneration
cutting and the successful re-establishment of a stand by natural
or artificial means.
Regular Uneven-Aged Structure (balanced)
-
A stand in which
three or more distinct age classes occupy approximately equal
areas and provide a balanced distribution of diameter classes.
Relative Humidity
-
The amount of moisture in the air as compared with the maximum amount that the air could contain at the same temperature, expressed as a percentage.
Relative Thinning Intensity
-
The periodic (annual) yield
of a stand from thinnings, expressed as a percentage of its periodic
annual increment.
Release
-
Freeing a tree or group of trees from more immediate
competition by cutting or otherwise eliminating growth that is
overtopping or closely surrounding them.
Release Cutting
-
A cutting operation carried out to release the forest crop (seedlings or saplings) from competition with undesirable tree species of similar size (termed a cleaning) or larger and overtopping tree species (termed a liberation cut).
Reproduction
-
see Regeneration
Reproduction Period
-
see Regeneration Period
Respiration
-
The processes by which tissues and organisms exchange gases with their environment.
Roguing
-
Systematic removal of individuals not desired for
the perpetuation of a population, e.g., from a seed orchard or
a nursery.
Root To Shoot Ratio
-
The ratio of ovendry root weight to
ovendry shoot weight in seedlings.
Rotation
-
The planned number of years between the year of the harvest of one crop of trees and the harvest of the next regenerated crop.
Row Thinning
-
see Thinning: row
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