Tag Archives: permaculture

edible forest gardens

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Now this truly is uplifting summer reading. It takes the idea of “perennial polycultures”, which are typical in the tropics, and asks whether they can work in eastern North America. I’ve spent some time in the tropics (Thailand in particular). Some people are worried about whether climate change will affect industrial agriculture in the tropics. But in my experience, people in the developing tropics are surrounded by more food than we are here in the developed temperate zone. Peoples’ yards are overflowing with mangoes, payapas, bananas, coconuts, peppers, eggplants and squashes of various sorts (mostly spicy sorts). Throw in some chickens foraging around, farm ponds full of fish, and bamboo for both food and timber, and you could really get by for awhile if the grocery store suddenly disappeared. Gardening there really doesn’t take much effort – once the plants are established. the effort is keeping the plants under control, if you are inclined to do that. If you don’t they just keep growing and producing food. Such is the amazing gift of solar energy.

It turns out we can grow fruit in the temperate zone too. Persimmons and pawpaws are native American trees, for example, but there are also hardy Asian persimmons and Asian pears, which are tougher than our native pears. There are hardy kiwis and yams that can grow here. There are “invasive” native wildflowers like Jerusalem artichoke that grow 10 foot tall stalks with edible, supposedly potato-like tubers. Not to mention some of our favorite perennials like strawberries and asparagus. The books go into a fair amount of detail on soil science, nutrient cycling, attracting pollinators, and other ecological topics, which is fun.

Geoff Lawton

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Here’s a Youtube play list of 200 videos with Geoff Lawton the Permaculture guy. I’ve embedded just one below.

Permaculture is great – it’s about sustainable agriculture and sustainable living in the dictionary sense of sustainability – entwined ecosystems and human settlements that can work together and persist for the long term. On a more practical level, it’s about farms and gardens that function as self-sustaining ecosystems, feeding people with very low inputs of energy and effort. The only possible criticism of it might be that perhaps its scientific core could be shored up a bit. But it really is a system-based ecological design philosophy that could be incorporated into a lot of mainstream programs, from small-scale farming to large-scale agribusiness to urban parks and trees.

November 2014 in Review

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At the end of October, my Hope for the Future Index stood at -2.  I’ll give November posts a score from -3 to +3 based on how negative or positive they are.

Negative trends and predictions (-6):

  • There is mounting evidence that the world economy is slowing, financial corporations are still engaged in all sorts of dirty tricks, and overall investment may be dropping. Financial authorities are trying to respond through financial means, but the connections are not being made to the right kinds of investments in infrastructure, skills, and protection of natural capital that would set the stage for long-term sustainable growth in the future. (-2)
  • Public apathy over climate change in the U.S. may have been manufactured by a cynical, immoral corporate disinformation campaign over climate change taken right out of the tobacco companies’ playbook. It’s true that the tobacco companies ultimately were called to account, but not until millions of lives were lost. Will it be billions this time? (-2)
  • Glenn Beck has gone even further off his rocker, producing a video suggesting the U.N. is going to ration food and burn old people alive while playing vaguely middle eastern music. One negative point because some people out there might not laugh. (-1)
  • The new IPCC report predicts generally negative effects of climate change on crops and fisheries. The good news is it doesn’t seem to predict catastrophic collapse, but we need to remember that the food supply needs to grow substantially in the coming decades, not just hold steady, so any headwinds making that more difficult are potentially threatening. (-1)

Positive trends and predictions (+6):

  • A lot is known about how to grow healthy trees in the most urbanized environments. But only a few cities really take advantage of this readily available knowledge. (+0)
  • As manufacturing becomes increasingly high-tech, automation vs. employment is emerging as a big theme for the future. The balance may swing back and forth over time, but in the long term I think automation has to win. New wealth will be created, but the question is how broadly it will be shared. The question is not just an economic one – it depends on the kind of social and political systems people will live under in various places. This might be why the field of economics was originally called “political economy”. So I’m putting this in the positive column but giving it no points because the jury is out. (+0)
  • Google is working on nanobots that can swim around in your blood and give an early diagnosis of cancer and other diseases. (+1)
  • Economic slowing is probably the main reason why oil prices are way down. Increased supply capacity from the U.S. also probably plays a role, although there are dissenting voices how long that is going to last. I find it hard to say whether cheaper oil is good or bad. I tend to think it is just meaningless noise on the longer time scale, but you won’t hear me complain if it brings down the price of transportation and groceries for a year or two. (+0)
  • Millennials aren’t buying cars in large numbers. I don’t believe for a second that this means they are less materialistic than past generations, but I think a shift in consumption from cars to almost anything else is a net gain for sustainability. (+2)
  • I discovered the FRAGSTATS package for comprehensive spatial analysis of ecosystems and habitats. This gives us quantitative tools to design green webs that work well for both people and wildlife. Bringing land back into our economic framework in an explicit way might also help. (+1)
  • “Perennial polyculture” gardens may be able to provide food year round on small urban footprints in temperate climates. (+1)
  • A vision for smart, sustainable infrastructure involves walkable communities, closing water and material loops, and using energy wisely. Pretty much the same points I made in my book, which I don’t actively promote on this site;) (+1)

Hope for the Future Index (end of October 2014): -2

change during November 2014: -6 + 6 = 0

Hope for the Future Index (end of November 2014): -2 + 0 = -2

backyard wildlife projects

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This Permaculture Research Institute article has some interesting videos about projects to attract more backyard wildlife. I don’t think I could convince my urban neighbors that these are a good idea (a “hotel” for centipedes and bees?) They need some adaptation and scaling for urban areas. It could be done though. I especially like the idea of girls playing with bugs – it is natural for children to be covered in bugs most of the time and modern society has gotten away from that.

nurse trees

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I find the idea of “nurse trees” interesting. From Wikipedia:

A nurse tree is a larger, faster-growing tree that shelters a smaller, slower-growing tree or plant. The nurse tree can provide shade, shelter from wind, or protection from animals who would feed on the smaller plant.

Eventually the younger plant outcompetes the older one, and the older one dies, or I suppose it can be cut down by humans. I am thinking about how to apply these ecological concepts to give a helping hand in more urban areas. In my professional work on stormwater management, we often dig up urban soils and replace them with a manufactured soil mix that is more permeable to water and better for plant growth. But all that digging and trucking and waste disposal has a cost and an environmental impact, when we are doing all this to try to help downstream water quality. Maybe we can use carefully chosen trees or plants early on to loosen and add organic matter to the urban soils, then come back a year or two later and plant the trees and plants that we want for the long term. Even better if there is some plant mix where the first phase is faster growing, but then gradually gets out-competed by the second phase, just like the nurse tree concept described above.