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Eco Organics has recently taken up
the management of a small (16 HA or 40 Acres) farming property at
Glenaroua. Located between Seymour and Broadford in central
Victoria, it is in a very low rainfall area, and its soils are affected by
high salinity, extreme erosion and poor productivity.
Agriculturally, it is marginal land at best, and has not been used
profitably for many years. Our aim in this project is to return the
property to sustainable and profitable agricultural production, while
improving the property's capital and environmental value. Below, you
will find an overview of the project, and the technologies we will be
applying, and in our Farm Diary
, you can read regular updates detailing
our progress to date.
The photographs below show how badly the farm
is affected by erosion. The erosion process can be well seen in the
sequence of photographs, taken from different areas of the farm -
commencing with deep potholes, which then connect underground to form
channels, running downwards along the watercourse. Finally, the
channels collapse, forming severe and deep erosion channels. Of
particular importance - as viewed in the rightmost photograph - the total
absence of topsoil in most areas surrounding the channel. This is a
consequence of a vicious cycle - removal of vegetation causes erosion,
erosion causes loss of topsoil which causes loss of vegetation - and on it
goes until the cylce is interrupted.
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Pothole forming - this is
the first sign |
Then underground channels
form |
Finally the channels
collapse - this one is nearly 2 meters
deep. |
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To break this cycle, we will,
over the next months, apply a totally new agricultural paradigm to the
farm - that of Natural Sequence Farming as developed by Peter
Andrews. His concepts revolve around landscape hydrology - mimicking
the ways nature manages water in the landscape. His methods, while
originally considered too radical, are fast becoming accepted by
scientists and policy makers around the world - largely because they
work.
Peter's two foundation properties in the Hunter
Valley in New South Wales have showed remarkable results - decreased
salinity, decreased erosion, the elimination of chemical use and
increasing organic levels and biodiversity - at the same time still
maintaining productivity and profitability. |
Peter Andrews, founder of
Natural Sequence Farming, as featured on ABC's
Australian Story |
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The Glenaroua Project, under
Peter's supervision, will apply NSF principles in the following
stages:
Stage 1: Landscape
Hydrology No agricultural project is ever going to work without a
sustainable supply of fresh water. Glenaroua's rainfall is low and
unreliable at the best of times, and this has been exacerbated in the last
5 or so years with severe drought conditions. Further, the farm
has been denuded of most of its natural vegetation, so when rain does
come, it rushes off the property, and with it goes many years of
topsoil. Repairing the landscape hydrology will prevent this from
occuring.
The process involves the
creation of leaky weirs - building walls in the gullies to allow water to
slow down as it moves down the landscape. The slowing of the water
allows settling of organic material that is suspended in the soil, and
hence building up of soil layers. Further, the leaky weirs system
allows for water to move laterally into otherwise dry areas of the
landscape, thus bringing those areas into production.
Stage 2: Introduction
of large volumes of organic matter The farm has been cleared of
most of its natural vegetation, although some of this is now
returning. This removal has meant that the soil is becoming
seriously eroded in key areas, and - along with the rest of the district -
affected by dryland salinity. NSF's clear principle here is to
re-introduce organic matter - and to stop killing any more plants.
On Peter's own farm, he gladly allows weeds to grow - these are generally
colonising species which grow prolifically where other plants will not -
and he will often slash them and allow the residue to lie on the ground -
thus increasing organic levels in the soil.
Eco Organics has developed a
range of such organic feedstocks - including Eco Bokashi and
OrganiCure - and will be experimenting with different types and
application methods in an attempt to find the most
the beneficial.
Stage 3: Application
of biologically activated sprays While it is clearly visible the damage done to the vegetation on
the farm, what is not clear is how much damage has been done to the
microflora and microfauna under the ground. It is possible, even likely,
that thousands of species of micro-organisms have been wiped out from
the soils - rendering them effectively lifeless. Once the solid foundations
have been established - sustainable water and organic
matter - we will then regularly spray the soil and crops
with biologically activated compost teas which will re-introduce thousands of
species of beneficial micro-organisms. As evidenced by the work
of Professor Higa of Effective Micro-organisms, and Dr. Ingham of the
SoilFoodWeb Institute, the presence of the right mix of microbes
allows for sustainable fertility in crop and vegetable production,
without the need for chemical
fertiliser, pesticide or herbicide regimes.
This stage will therefore
involve the application of biologially activated sprays to improve the
microbe-diversity in the soils. When this is combined with organic
matter (Stage 2), water soluble nutrients - in their correct form,
concentration and mixture - will be immediately available to plants and
lay the base for sustainable, non-chemical farming.
Stage
4: Revegetation The soil is now returning to its natural,
sustainably productive state. To keep it in this state, it is
necessary to revegetate - at Glenaroua this will entail the introduction
of large numbers of trees. The choice of species will be made on
good permaculture principles - each species must have a number of
functions, including:
- profitable - the trees must create income
for the property;
- rehabilitative - the species must add
value to the soil and continue the upward spiral of productivity that
has been started by applying the first 3 stages;
- fire retardant properties.
Of particular concern for farmers in our
district is the absence of real profitability when relying on traditional
farm pursuits (stock, grass fodder and cereal crops). Our focus will
be on long term profitability which simultaneously improves the farm -
trees which can be sold for profit, but which increases the productivity
of the soil. Currently, our selected species are:
- Paulownia tomentosa. These are a
fast growing, deciduous tree, with valued timber. We have chosen
these because of their profitable timber regime (assuming adequate
rainfall/irrigation which we are ensuring with our landscape hydrology),
their deep root systems which will harness the water table and cycle
nutrients from lower soil layers, and their deciduous nature - the leaf
drop will be used as either a stockfeed supplement or as humus for the
soil - either way the organic levels of the soil will
increase;
- Tagasaste (tree lucerne) Cytisus
palmensis. These are fast growing shrubs, which harbour
nitogren-fixing bacteria on their roots, thus improving the soil.
They also produce excellent stockfeed - often with protein levels
similar to that of the king of fodder, lucerne (hence the name).
It is also a fire-retardant plant, and can limit the extent of
bushfires;
- Lombardy poplars. A puzzling choice
according to some, as it is not a native, but Peter Andrews
strongly recommends it - and for good reason. It is a deep rooted
plant with a deciduous cycle, thus it cycles nutrient and organic
material from lower soil levels back to the surface. Unlike some
natives, the poplars will allow other species (grasses and other
fodders) to grow right up to the trunk, where micro-climates created by
the canopy are good for both fodder growth and stock shelter.
Finally, their timber is of value if grown carefully, in the long
term;
- Olives. An environmental weed in
some states, it has proved to be very well adapted to harsh Australian
conditions. The market for oil and fruit is well-established in
Australia, even though there is a high number of plantations coming into
production.
- Carob. A crop tree in its infancy in
Australia but one which shows great promise. Its roots harbour
nitrogen-fixing bacteria, and the high-yields of seeds are an excellent
food source for both animals and humans. After 6-7 years of good
management, they can produce as much profit as an acre of cereal crops,
all the while improving the farm rather than depleting it.
- Other nut species (to be decided).
In 2007 we will continue the planting regime and include such species as
pine nuts, walnuts and pistacchios, depending on the success of our
first plantings. Even traditional oak species produce good crops
of nuts which are an excellent stockfeed supplement.
For a more detailed technical description of this
model, please view the author's article "Sustainable Farming: what it is, what
it is not, and how to make it pay"
. Also,
please visit the websites of www.nsfarming.com and www.soilfoodweb.com.au, along with our product pages on
this site.
We will keep this website
current with photos and reports of the progress. Please check here
regularly for updates.
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