Harvesting, the
Environment and
Integrated Resource Management
Logging
Plans
Modern
forest practitioners, when planning a timber harvest, always
consider the global woodland environment _ _ that is, all forest
resources, not just the trees to be cut. That is why, when
logging operations are included in your forest management plan,
so too is a logging plan.
A logging
plan saves you time and money by laying out ahead of time how
various harvesting activities are to be co-ordinated. It is
usually presented with a map showing specific cutblock
boundaries, main and spur roads, primary and secondary skid
trails and landings. For each cutblock in a management area, the
plan describes how, and with what equipment, felling will be
done, and how the wood is to be forwarded from stump to
landing.
Logging
Rationale, Strategies and Methods
Why Harvest?
You may
decide to harvest timber for a number of reasons: to replace
completely one crop with another; to improve, by thinning and
spacing, the quality and value of the end crop; to salvage for
sale timber that would otherwise be lost because of blowdown,
parasites, disease or fire; or to realize the cash value of the
end crop you have raised. But when, how and what quantity should
you cut? How will you regenerate the area afterwards, and with
what species?
When to Harvest?
Timing the
harvest depends on the age of the stand, its rate of growth, the
presence of insects or disease, fire or wind damage, the
financial needs of your community and the state of the market. To
harvest before the stand has reached its maximum annual
growth means losing significant volume and revenue. But to
harvest after this point means retaining a stand whose
annual growth in value is slowing down. Of course, if the market
is poor, the trees can, and should, be left growing, albeit more
slowly, until prices pick up again. As long as fire protection
measures are in place and you don't need maximum cash
immediately, it is best to hold out for a favourable market.
While waiting, you could cut a few commercially valuable
trees to provide modest cash flow. However, it's important not to
"high-grade," that is, to take only the best trees, while letting
the stand as a whole continue growing.
How Much to Cut?
Good forest
practice dictates that harvests be more or less equal to the rate
at which trees are growing. When the harvesting area of your
forest is managed for a sustained yield, your management plan
indicates an annual or, since many reserves have relatively small
areas, a periodic cut. The plan, of course, builds in flexibility
to take account of fluctuating market conditions.
Silviculture Systems
There are
three main logging and regenerating methods which foresters call
silviculture systems. They use this term because they are
describing not just different ways to cut, but also the
corresponding ways to prepare a new seedbed after cutting, that
is, the ways to regenerate the next crop. The three main
silviculture systems currently used are clear-cutting, selection
cutting and, to a lesser extent, shelterwood cutting. Each has
advantages and disadvantages.
Clear-cutting
Clear-cutting, or removing all trees from an area in one
cut, is the most common, and most criticized form of
industrial harvesting.
This method
is used either to remove an entire stand and produce a new,
even-aged stand or to introduce to the current stand a new
species, such as Douglas fir or lodgepole pine, that requires
full sunlight. A forest manager may also be obliged to clear-cut
after a fire because it is the most effective way to salvage dead
trees and burn-residues, or in unhealthy forests to stop the
spread of certain pests and disease.
After
clear-cutting, the seeds which have been left when trees are
felled, or those blown over from trees bordering the harvested
area, can regenerate naturally. Cutting usually coincides,
therefore, with the time that trees drop their seeds. A variation
of clear-cutting, called the "seed tree method," leaves selected,
wind-firm trees standing, scattered throughout the cutblock, to
provide numerous sure seed sources for natural regeneration. The
clear-cut area may also be planted with seedlings to improve its
appearance immediately.
A
management plan prescribing a clear-cut silviculture system
outlines the corresponding follow-up treatments _ _ site
preparation, possible fill-in planting, and then brushing and
juvenile spacing _ _ which promote good natural
regeneration.
Advantages
Clear-cutting has two major commercial advantages: it
can be carried out easily over large areas at one time, and
equipment and logging methods can be chosen without concern for
damaging "leave" trees or plants on the forest floor.
Disadvantages
Clear-cutting is totally inappropriate in an area
managed for multiple uses under an integrated resource-management
plan. It can be harmful to the environment in many ways. Without
trees to use the groundwater or rainwater, the soil may become
wetter and less stable; nutrients are depleted or washed away.
Clear-cutting, particularly on steep slopes, can increase the
potential for erosion, landslides and rapid run-off until the
area regenerates. Finally, in addition to leaving the land
looking raw and naked for several years, the monotonous even-aged
forest that clear-cutting creates lacks the appeal of varied,
uneven-aged woodlands.
Selection Cutting
Selection
cutting creates or maintains uneven-aged stands. Its objectives
are to maximize use of the area, maintain site stability and
encourage good regeneration. Under this silviculture system,
partial cuttings are made repeatedly so that regeneration is
continuous. A permanent forest cover is, therefore, maintained.
Mature timber is removed either in small groups or as single
trees scattered among younger, not yet marketable trees.
Selection cutting is the preferred method for harvesting special
products such as pilings, poles, building logs and fencing
material.
Advantages
In
second-growth forests with potential for significant increases in
timber growth and value, the selection cutting system works well.
Like thinning, which it closely resembles, it brings in
continuous revenues. At the same time, this system encourages the
regeneration of more vigorous and resistant species, and improves
the health and growing conditions of the plants and trees left on
site. Many reserve woodlands are second-growth forests where the
selection cutting system would be ideal.
The
selection system, because it regenerates uneven-aged stands, also
encourages wildlife that flourish in habitats created by a mix of
young and older trees. In addition, selection cutting protects
soil from overexposure because it maintains a more natural
forest, and requires fewer mechanical or chemical treatments to
make trees thrive. While selection cutting demands care to
prevent damage to trees being left ("leave" trees), this greater
effort protects, and more completely utilizes, all forest
resources.
Selection
cutting requires more extensive roads for access than
clear-cutting. However, the additional roads are mainly branch
roads and skid trails which facilitate fire protection and
silvicultural treatments, as well as access for recreation,
hunting and trapping.
Disadvantages
Selection
cutting requires more difficult and expensive procedures and
equipment (particularly with increasing ground slope) to protect
the soil, trees, seedlings or other plants remaining on site.
However, both the potential costs and damages can be minimized by
advance planning and careful supervision of work.
A Note of Caution
A note of
caution is in order for those considering the selection system:
determining which trees to cut and which to leave requires
professional expertise and guidelines specific to each site. The
choice of trees to cut has an impact on all future management
activities, the final value of the end crop and the global forest
environment. A wrong decision can undo years of effort and
investment.
Shelterwood Cutting
The
shelterwood system is a variant of selection cutting. It is
designed for shade-tolerant species which can grow under the
canopy of the final crop of trees. Under this system, a sequence
of cuttings, also rather like thinnings, gradually removes the
original stand of trees. The first cutting creates vacancies in
the stand and encourages the natural regeneration of a new crop;
subsequent cuttings remove the shelter of the old crop to make
growing room for the new one. Under the canopy of mature trees,
both seedlings and the soil are protected from overexposure and
temperature fluctuations. Shading also discourages some competing
vegetation and may reduce the need for brushing.
Comparative Costs and Cash Flow
Clear-cutting is initially cheaper than either selection
or shelterwood cutting, but subsequent silvicultural treatments
cost more. The most significant difference among the systems
relates, therefore, to cash flow. Clear-cutting brings a higher
immediate return, followed by a long delay in income until the
second crop grows. Selection and shelterwood cutting offer lower,
but continuous revenues because natural regeneration is
continuous, proceeding along with small scale, scattered
harvesting.
Logging
Activities Common to All Systems
Regardless
of the cutting system or size of the forest, six basic activities
are involved in logging:
- felling
and delimbing the trees;
- yarding,
or transporting the tree lengths to a central location called a
landing;
- bucking,
or cutting the tree lengths into logs of prescribed
lengths;
- loading
the logs onto trucks;
- hauling
the logs to the sorting area or mill; and
- disposing
of slash, and rehabilitating and preparing the site for
regeneration.
Each of
these activities can be conducted in a number of ways using a
variety of equipment. The choice depends on the material to be
harvested, the site conditions and the silviculture system you
select.
Felling
and Bucking
For First
Nations just beginning forestry operations, felling and bucking
will be their first logging activities. The purchase of a few
chain saws is the only capital outlay for equipment.
Felling and Delimbing
Before
starting work, crews are trained carefully. Safe felling and
delimbing is an acquired skill which cannot be learned from books
or videos alone. It calls for knowledge of equipment and tree
behaviour, and instant good judgment to guard against the
constant danger of snapping limbs, rolling logs and kickbacks.
For these reasons, felling and delimbing should only be done by
experienced tree-cutters working under an even more experienced
foreman/forewoman.
Yarding and Skidding
Yarding
means transporting logs from the stump to the landing where they
are loaded onto trucks. On steep slopes, logs are usually moved
by machines that partially lift them.
On flat or
rolling terrain, skidders or crawler tractors drag the logs with
heavy wire cables called "chokers" or with grapple hooks.
Skidding can also be done with draft animals and, with less
danger to man and beast, with specially designed, small
winches.
Bucking, or Cutting Felled Trees into
Logs
Bucking is
usually done by the feller, either in the woods or at roadside
landings before hauling to the mill. Correct bucking can actually
increase the value of your logs by removing defects or creating
special products. Simple things, such as square cut ends, and
accurate measurement to include trim allowances, can mean the
difference between getting the top or bottom dollar for your
log.
Decisions
on how to buck a log depend on the tree's quality, the
distribution of knots and knowing what the buyer wants. An
experienced, knowledgeable foreman/forewoman in charge of the
bucking crew can ensure correct bucking for maximum profitability
of your operations.
Loading
Many First
Nations were encouraged to develop their forests when the
self-loading logging truck revolutionized small-scale operations,
making it profitable to recover small volumes of material -- even
one or two truckloads. If a self-loader is not available in your
area, front-end or wheeled loaders with grapple hooks can also be
used profitably for small-scale operations. Alternatively, First
Nations who don't want to buy any equipment can contract out the
loading.
Hauling
Hauling is
often contracted out. Its cost is affected not only by distance
from the mill or log dump, but also by landing organization and
loading efficiency. Your First Nation can, therefore, control
hauling costs, often a large portion of overall logging costs,
through careful advance planning of road and landing layouts. A
professionally designed logging plan will locate your landings
and skid trails for efficient, environmentally sound operations
and cost-effective loading and hauling to maximize
profits.
Slash Disposal and Site
Rehabilitation/Preparation
When a
logging operation is finished, the residue, called "slash," is
handled to reduce fire hazards and to prepare the site for
reforestation. This residue is usually slashed to lie flat and
decompose faster so it fertilizes the area for planting hence its
name. Alternatively, the slash can be spread and "broadcast"
burned throughout the cutblock. In this case, firebreaks and
other safety measures will be necessary and a burning permit may
be required. The debris accumulated at landings is spot burned
rather than buried under road construction areas because it is
not stable enough for fill.
Affordable Logging and Processing Equipment for Small
Operations
If a First
Nation company, or the First Nation itself, does the logging or
any phase of it, it will have to choose equipment to rent or buy.
The choice depends on several factors: the size of the
operations, which jobs it is going to do, whether it will do them
with hand-held equipment or with heavy machinery, and what the
comparative performance, risks and costs of the different
machines on the market may be.
Often,
First Nations join forces to keep costs down. Like co-operatives,
they share expenses for jointly used equipment, as well as for
other operations like hauling that they contract out.
The growing
interest in forestry on reserves has increased interest in the
less expensive, scaled-down equipment, including portable saw
mills, now readily available.
Some First
Nations, however, are not yet prepared to purchase machinery.
Instead, a few of them have modified basic farm machines they
already own for yarding, skidding or site preparation. In so
doing, their most important concern was safety, since on slopes
or with larger, heavy logs, tractors can be pulled over backwards
without warning. Other First Nations have investigated horse
logging for use in sensitive or wet areas, and for selection
cutting, thinning or loading. They have also become aware of the
need to deal with concerns that horse logging raises about
safety, and about the treatment of animals working in the
bush.
Protecting the Environment
Unplanned
harvesting can damage the environment. The best time to
protect the environment is before harvesting begins; the best
way to prevent environmental damage is to review your
logging plan from the environmental perspective. Look
specifically for activities that could damage the environment. If
you find any, revise your plan to prevent or limit the damage.
There are a number of things to look for.
- Harvesting
on steep slopes can accelerate water run-off into streams and
lakes, and thereby damage fish habitat and affect drinking water
supplies. It can also lead to erosion by carrying away topsoil
and inhibiting future regeneration of the forest.
- Harvesting
near streams, lakes and rivers can cause debris to enter
waterways, disrupting fish habitat, and increase water
temperatures by reducing shade.
- Harvesting
in wetlands and permafrost can cause long-term disruption in the
ecology of an area, because the harvesting equipment can disturb
the soil, cause ruts, disrupt drainage, and leak oils and other
fluids into the environment.
- Harvesting
in ecologically unique areas can lead to the irreversible loss of
the unique species inhabiting the area.
- Harvesting
in areas likely to be seen by tourists can destroy natural
settings and scenic beauty.
- Harvesting
in breeding and nesting areas, or on migration paths, can
adversely affect wildlife. Access roads can make it easier for
hunters to reach wildlife.
Where the
logging plan contains components likely to lead to environmental
damage, it should be modified. In many cases, measures can be
taken that will limit harvesting damage. For example, harvesting
in wetlands can be scheduled during winter, and skidders with
wide tires can be used. Harvesting near the breeding areas of
wildlife can be scheduled outside the breeding season.
Harvesting
operations must also be carried out with care. Logging debris
needs to be managed to reduce fuel sources in the event of a
fire. Cutting, grinding and welding metals, or the improper
handling of flammable substances can lead to forest fires.
Careless skidding and yarding can damage standing
trees.
Legal
and Regulatory Requirements for Harvesting
The purpose
of the forestry provisions of the Indian Act and the
Indian Timber Regulations is to assist First Nations to secure
economic benefits from their forest resources, while protecting
the environment and providing for the stewardship of the forest
resource.
To achieve
these objectives, the Indian Act creates offences for
cutting and removing timber from a reserve without permission of
the Minister of Indian Affairs and Northern Development. In
granting permits or licences to cut timber, the Minister seeks to
ensure that timber revenues are collected for the benefit of the
First Nation. A logging plan is normally required before a permit
or licence is issued. It is reviewed to determine whether there
are environmental implications. If so, the logging plan may need
to be revised to reduce or limit environmental damage. First
Nation Councils must consent to permits and licences issued for
reserve land. They are encouraged to seek independent legal and
professional advice before giving their consent.
If your
First Nation wants to harvest on provincial Crown lands, it will
also have to obtain a permit. While some details of requirements
for a permit vary from province to province, applications usually
must include a cruise summary and maps, appraisal data,
silvicultural prescriptions and a logging plan.
How
Will You Be Paid for Your Timber?
Scaling and Grading to Determine
Price
When timber
is cut for sale, it is "scaled," either by the volume of the
piece or by its weight, to measure the quantity or volume of
timber logged. In addition, in many regions, when logs are scaled
they are also graded to determine their value. They are then
bought or sold by grade category. The grade is determined by the
size, growth rate, form or shape of the log, and the presence and
size of knots and rot or insect damage.
Pricing Special Products
Special
products are specially measured for pricing. For example,
pulpwood is measured and scaled in stacked cubic metres; firewood
is measured and sold in cords.
Christmas
trees are graded by form, density, height and species; poles,
pilings and building logs are "stick-scaled" for length and
diameter and priced accordingly.
Back
|