P.A.Yeoman’s Scale of Permanence
The farm is situated 3 hrs drive from Oslo, 4 hrs from Stockholm & 3.5 hrs from Gothenburg in the heart of Scandinavia.
•Latitude: 59°50’15” N, Longitude: 13°08’34” E,
•Land area of 10.6 ha (26.1 ac)
•Elevation between 120 – 167m above sea level
•Cold Temperate/Humid Continental Climate
•Approx. 634 mm of rainfall per year, or 52.8 mm per month.
•Average 147 days per year with more than 0.1 mm of rainfall or 12.3 days with a quantity of rain, sleet, snow etc. per month.
•The driest weather is in February when an average of 31 mm of rainfall occurs.
•The wettest weather is in August when an average of 73 mm of rainfall occurs.
•The mean temperature is cool at 5.4 °C (41.7 °F)
•Mean monthly temperatures have a variation of 20.8 °C (37.4°F) The average daily temperature range/ variation is 7.9 °C (14.3 °F).
•The warmest month (July) is very mild having a mean temperature of 16.1 ° C (60.98 °F).
•February is the coldest month (slightly cold) having an average temperature of -4.7 ° C (23.54 °F).
•Average 120 days frost- free (1- 30 day variance)
•Swedish Climate Zone 3- 4
•Wind, predominantly S but quite sheltered by surrounding forest
•Soil: Moderate Clay loam. Depth between 10- 30 cm with both sand (upper ridge) and clay subsoils 20- 300cm+
•1.5 ha 90yr+Spruce plantation
•0.2 ha 25 yr Spruce/ Larch/ Birch
With such a short frost-free growing season we have less perennial species available at our disposal than some of you might be familiar with, however I can think of at least 180 solid cropping perennials for this climate zone (We are profiling 5 a week currently on our blog) Options like biomass gasifiers which can heat and power lighting for greenhouses as well as the farm will prove very handy in a country like ours where most farms have access to forest. In fact, Sweden was a leader of this technology during the WW11 era when a lot of cars ran on wood gasification. We will look at innovative uses of appropriate energy in the final article as we are trying to close the loops and make the farm as future- proof as possible regarding oil & resource inputs.
The open grasslands are (often only) kept open by subsidized mowing by machines where herbivores are strangely absent. From what I’ve seen of the farms I have been working at here, as well as our own, the pasture is degrading back to moss, over the summer I’ve being taking people out to monitor supposedly “healthy” pastures with large proportions of moss and bare ground. They look green at least! This is indicative of a combination of water logging, poor nutrient cycling and highly compacted clays- we couldn’t get our penetrometer more than a couple of cm into the soil anywhere we visited this dry summer. The grasses also suffer from lack of grazing impact in this negative spiral and typically the response is to plow and seed for a quick- fix relief. This never addresses the root cause, nor supports the future resource base we are managing holistically towards.
Brief overview of primary landscape components
The Keypoint is usually the highest place to economically store water in earthen dams in a landscape unless there are saddles in the main ridge. As water naturally leads to this point on it’s S shaped flow through the landscape (water always flows perpendicular to contour) and due to the shape of the valley, this is usually where the earth resources exist for this type of construction, as well as being a shape with optimal capacity: soil moving ratio. This high placement in the landscape forms the backbone of gravity fed irrigation systems. We do not have these feature’s at ridgedale, and we do not have the water issues of the brittle landscapes, but we will be making effective use of water and keeping it under very good control without using power.
It is worth noting that whilst a lot of properties do not have any significant landscape features such as these, the principles, affects & design sequence of Keyline design remains highly effective.
Part of the significance of these primary landscape components is understanding how water moves in relationship to land shape. Water is the basis of all life on earth, and the limiting factor in most agricultural production. Managing water effectively is crucial for future- proof resilient food systems. What you notice if you get a map out is that the valleys are a small percentage of any landscape, while ridges make up the majority of the landscape. In Yeoman’s work, He observed how valleys tend to have adequate water and that ridges tend to dry out rendering them unproductive. That was in a Mediterranean climate. We are in a very different setting. Following this patterning is still very useful in our scenario as it can help alleviate wet spots, hold water on the ridges longer, accelerate soil building, aide tree planting and allow better infiltration of summer & autumn rains amongst other benefits.
Landform at ridgedale PERMACULTURE
Design following the pattern of the landscape, not imposing onto it
In some landscapes where primary landscape components are present establishing the plow pattern is based on following parallel to the Keyline up and down the valley, and on the ridges following the lowest contours parallel up the ridge. Combined this creates a pattern that is off contour, save the Keyline, and leads downhill from valley center to ridge center. This can also be approximated by feel, which is more likely on smaller properties and when primary landscape features are not present, but still following the basic premise. PLEASE NOTE THESE ARROWS ARE FROM A CADASTRAL PLAN, THEY DO NOT MARK ANYTHING USEFUL!
We also have heavy compaction, not great for our pasture, and certainly not good for planting trees directly into. This land was once known for it’s apples, and our neighbor can remember a lot of apples here 50 years ago. The soil is also thin here in places, down to 15cm. The neighbor asked why I would want to pull a subsoil plow through below the topsoil into the “dead mineral” layers? Well, the reason is at least 3 fold. Firstly, the only difference between topsoil and subsoil is life, air and water. We can begin to address all that with a simple pass of the plow, and can accelerate our impact by applying compost teas, biofertilisers, etc. A regenerative agriculture could be defined as one that, at the very least, builds soil. All land-based production is founded upon growing soil, which remediates so many of our issues.
Secondly, we lift compaction, and one of the advantages of the Yeoman’s Plow over generic subsoilers is the effective explosive sub- soil shattering that occurs up to 30cm from the point, due to the angle of the foot and the tip dynamics. We encourage deeper rooting, allow water to sink, and following this geometry hold water on the ridges for longer. Timing is important here, and we will look when we get to soil.
Thirdly we can make high quality tree beds for better establishment of our perennial tree and shrub crops. Long-lived & slow growing organisms are valuable and just like children, a good start sets up the foundation for the rest of life! After sub soiling the fields we will power- harrow the tree strips as a basic weed disturbance, then deep rip the tree lanes with a rotavator bed- former attached (2 shanks spaced widely to accommodate staggered plantings) Whilst we will get a profusion of grasses coming back we will seed a diverse array of support plants for the intensive tree & shrub plantings (which will be spot mulched with woody material to help the soil foodweb begin shifting to a more optimal fungi:bacterial ratio.) This pattern cultivation will allow us to continue our soil development work in the pasture strips between the trees.
Richard Perkins is director of Ridgedale PERMACULTURE, a pioneering project in the heart of Scandinavia where we demonstrate & educate about Permaculture, Keyline Design and managing holistically. We hold regular PRI (Aus) & PC Assoc (UK) certified PDC trainings as well as awesome 10 Week Permaculture Internships with over 530hrs of curriculum based learning and 5 Certificate courses beginning April & Jul 2014
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