Home' Otago Southland Farmer : August 24th 2012 Contents 16
Specialists in :
Logging and Forest
Phone 03 215 6086 (Invercargill)
DUNEDIN CARRYING COMPANY LIMITED
20 Donald Street, Dunedin.
Ph Campbell Gilmour 03 478 8066 Mobile 027 620 0730 Fax 03 488 0047
Log, Post & General Cartage Specialists
03 478 8066
If you are considering selling mature
Pinus Radiata or Douglas Fir, give us a
call for a competitive price
Ph: (03) 236-7533
Craigpine for your complete harvesting solutions
Box 5990, Dunedin • Email: firstname.lastname@example.org
Phone/fax: (03) 476-6251 cell: 021 616-605
SPECIALISTS IN FARM
• Environmental Best Management Practice
• Environmental Farm Plans
• Farm Forestry/Shelter Plans
• Effluent Systems Management
• Resource Management Advice
Land & Forest Consultants Ltd
Have you got your shelter?
Very fast growing
shelter tree especially
under irrigation, narrow
and upright. can tolerate
windy sites, good for
soil conservation and
25 per bundle
*Large grades available
A thick multi-stemmed
willow with masses of
large catkins in spring.
Vigorous on moist sites
or under irrigation. Will
tolerate extreme cold.
25 per bundle
*Large grades available
0800 421 444
282 Ferry Road, 1 KRD, Oamaru
Forestry Advertising Feature
Heavy penalties for no shelter
Many southern farmers are still not aware they could face
heavy penalties in the local District Court if they do not
provide adequate shelter for their stock. This also
includes newborn lambs.
When the pioneers from the United Kingdom settled in the
rural areas of Southland, they cleared not only the scrub but also bush
and trees. They did this in a bid to graze as many sheep as possible on
what were even then, quite small farms.
However as time went on it became obvious stock lose condition if they
do not have adequate shelter from the cold southerlies that blow across
Southland all year round.
Another matter also became obvious to the pioneers.
Small farms were not economic units even with the
great southern soils and moist springs and summers.
Over the year more and more shelter belts were
planted and more and more small farm units were
combined into one. Over the years, southern farmers
have evolved a pattern and type of farm shelter,
which, while not the same in every case, has
continued on in more or less the same form.
First of all, farmers planting shelter must understand
that a shelter belt is a filter --not a wall. When planted
with this in mind there is little of the turbulence that
may disturb stock, while at the same time providing
the stock with adequate shelter from wind and
People, plants and animals thrive in sheltered
environments. Ensuring farm animals are not
exposed to weather extremes requires well-oriented
shelter and creating a more sheltered environment
should be an important farm management objective.
Shelter decreases stock losses at the vulnerable
periods of lambing and shearing and lamb mortality
rates could be reduced by at least 5 percent as a
direct result of lessening the effects of adverse
weather at lambing time. Good shelter also offers the
possibility of more flexible shearing dates and
improves efficiency in the use of expensive
There are four main contributing factors relating to
effectiveness of shelter. These are orientation,
permeability, length and height.
Of the first of these, any barrier should be sited at
right angle to the prevailing wind. On permeability it
appears 50 percent porosity has been found to be
the most successful. This may be achieved by
planting species that have proved themselves in this
regard and ensuring they are planted at pre-
determined spacings and pruned regularly.
On the third factor, as well as height, the longer the
windbreak the better the protection. Short planting
have a disproportionate edge effect where wind slips
around the ends reducing the area of protection.
Experience recommends tall shelter as the area
protected is directly related to the height of the
windbreak. It is important to spend some time in
planning a shelter belt and there is a high standard of
establishment management. In doing this the prime
matters to be considered are length and height. It
has been proved conclusively that long plantings are
more effective than short ones. It is important also to
ensure a high standard of planting whereby all of the
Remember that where the saplings do not strike
there will be a gap in the shelter belt and the wind
will accelerate through compression and come
screaming though that gap.
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