No. 3 in an occasional series of articles covering agroforestry-related topics in greater depth
With all the uncertainties and misconceptions in today’s post-truth, post-growth (see below), post-carbon era, it’s easy to see everything just from the point of view of one’s own locality, country or continent, and not to take into account what’s happening in the wider world. For example, is the view of the farmer in the drought-stricken plains of central Tamil Nadu in India on, say, poverty the same as the French farmer harvesting his irrigated maize? No, in all probability! The bigger picture is relevant to our own situation, in that we can broaden our own experience and understanding, and face the challenges now confronting us, by looking at other approaches from other regions and cultures, and Covid 19 is a stark reminder that the whole world is in the same boat.
Recent world history, let’s say the last 75 years, with the effects of fossil fuel use, corporatisation, globalisation, greenhouse gas emissions, agro-industry, pandemics and climate change, has shown us that the current model isn’t working, and that we need to change course. Indeed, the latest health crisis is forcing us to adapt in ways that we never even dreamed of six months ago – internet home schooling, for example, and all that that will lead to.
From my point of view as an agroforester, I think we can learn a lot from current global activity in my field, as it is demonstrating that it is possible to think in terms of local not global, of food not junk, of Nature not agri-business, of quality not quantity, of individual not corporate, of trees not fields, of ecology not economy, and of soil not desert.
“Agroforestry systems include both traditional and modern land-use systems where trees are managed together with crops and/or animal production systems in agricultural settings. They are dynamic, ecologically based, natural resource management systems that diversify and sustain production in order to increase social, economic and environmental benefits for land users at all scales.”FAO (2020) Agroforestry. http://www.fao.org/forestry/agroforestry/en/
Of course I am not suggesting that agroforestry alone can solve the world’s problems, but it offers clear parallels and is a good example of how we can move forward to combat the difficulties facing us today. Let’s look at some of the alternatives mentioned above in more detail:
Local not global: Just as we have seen this year that we can do without air travel and transport to a large extent, (air cargo capacity at half 2019 levels (1), international air passenger traffic at -60% of seats offered (2)), so we have begun to appreciate that it is possible to eat well with fewer exotic foods shipped in at great expense, financially and environmentally, from all over the world. And ‘local’, certainly here in France, has become a buzz-word in the media, especially in relation to better food.
In terms of food value, industrially-produced tropical fruits shipped to temperate locations, for example, are usually irradiated, which can have unpredictable and often substantial effects on vitamin content (3), they often have a higher glycemic index than temperate fruits (4), and we have all experienced unripe and tasteless tropical fruit! There is no comparison between an imported pineapple in Europe and one fresh off the tree in Sri Lanka, where the central core is arguably the best part. Maybe we need to take a new look at local value/supply chains and nutritional values, a principle that operates anywhere that food can be grown, from a Ghanaian tropical forest garden to an allotment in the Severn Valley in mid-Wales.
Agroforestry initiatives the world over, temperate, boreal and tropical, are addressing the down-sizing and local supply challenges we are facing, whether it’s agroforestry in Sweden (5), including a small but significant forest-garden movement, the rainforest agroforestry polycultures of Costa Rica (6), or the highly organised agroforestry system in the United States (7). And India has a national agroforestry policy, state funded and with incentives for universities to reform their syllabuses to include agroforestry.
And the principle doesn’t apply just to food of course – marketing dogma has for a long time dictated that we ‘need’ the latest, most fashionable and cheapest products possible, and that has meant manufacturing them in the cheapest place possible, but times are changing. Local production of a wide range of goods close to a source of raw materials has multiple advantages in terms of reliability, quality, availability and sustainability over those imported from factories on the other side of the world, and need not necessarily just be for local markets. One well-known example of this and the triumph of local production over world-grabbing business is the ubiquitous Laguiole knife brand from southern France, in the village of the same name. In 2017, after a 19-year battle, they won back the right to exclusive use of their name from a Paris entrepreneur, who had somehow usurped the brand and the famous bee logo to sell a much wider range of cheaper kitchen products, many of them manufactured in China (8).
Food not junk: In a previous article on this site (Article No. 2, Sustainability: what does it mean exactly?, June 15th, 2020), I mentioned that it is easy to be persuaded that, for example, ‘fresh’ organic food in a supermarket is fine, when in reality it is not if you stop to think. It is very often industrially produced, far from its point of sale, has been stored and shipped under less than ideal conditions and over an indeterminate amount of time, and disrespectfully handled by supermarket staff! Have you ever seen sad, yellowing broccoli on the vegetable counter, sweating under a plastic film? And yet we seem happy to accept that somehow this is OK.
Malnutrition is generally taken to mean under-nutrition, but it now clearly also indicates over-nutrition, eating too much ultra-processed food and not getting enough exercise. In ‘developed’ countries, notably the United States, and increasingly Europe, obesity rates are high, and growing. Today, there are more deaths worldwide related to obesity and overweight than among those who are underweight, according to the World Health Organisation (9), and that’s without taking Covid-19, which has highlighted immunity dangers due to poor diet, into account (10).
The world’s leading agroforestry organisations (among others, the Centre for International Forestry Research (CIFOR, Indonesia), the International Centre for Research in Agroforestry (ICRAF, Kenya), the Association Française d’AgroForesterie (AFAF, France) and the Food and Agriculture Organisation of the United Nations (FAO, Italy)) work hard to increase sensitivity to the need for more sustainable use of land and the production of nutritious food for all. Unfortunately, their message is not getting through to the general public in the wealthy countries because of a perceived lack of need. But in view of the obesity problems mentioned above, we might wonder who it is that needs their advice the most!
Trees not fields: Agroforestry is about trees with crops and/or livestock (Article No.1, Agroforestry and the Forest Garden, May 31, 2020); industrial agriculture is about fields, productivity and profit. The argument of “Yes, but we need to feed the world” is fast evaporating because of the problems outlined below, and because both productivity and profit, not just in agriculture but across all economic sectors, have been in decline for a long time, such that we are now in ‘post-growth’.
Real long-term interest rates (Source: OECD, cited in Bergeaud et al (11)), a graphic decline in the finance sector which leads to a similar fall in productivity growth.
I include the above illustration not because I know about economics (I don’t), but because it illustrates the point very well, symbolic of a spectacular decline across the board, and modern agriculture is no exception, indeed it is guilty of much more than just profiteering. The environmental and social effects of this sector’s disregard for the health of the planet and its people are well-documented (12, 13). As Roger Leakey, who has spent a lifetime in agroforestry research and writing, puts it in Living with the Trees of Life (14, p.18): “agriculture needs to shift from environmental culprit to environmental, social and economic saviour”.
Agroforestry is one way in which this can be achieved. The fact that around 70% of the world’s food production is in the hands of just 1% of landowners, and that about 84% of farms across the globe are of less than 2ha (15), should be seen as a sign of hope, not despair, despite the fact that it is a scandal. The 1% is a relatively small number of people to convince that they need to change (indeed they will sooner or later be obliged to change, see below), and the 84% is a huge resource for the future of sustainable food production. It is a sea change in outlook that is needed now.
Leakey (14, p.171) cites an African proverb: ‘If many little people, in many little places, do many little things, they will change the face of the world’.
The ways in which trees can benefit the land are many and varied – leguminous plants of all kinds from tall trees such as Robinia pseudoacacia to the garden pea, absorb inert nitrogen from the air and with the help of bacterial colonies on their roots, convert this into a usable form, one of the most effective and ecologically efficient ways of enriching the soil. Their fallen leaves also contribute nitrogen to the humus layer on the soil’s surface. Hedgerows on contour lines of slopes reduce water run-off and soil erosion (they too can be nitrogen-fixing), trees actually produce water through transpiration and reduce desertification, tree roots penetrate deeper into the soil, increase aeration, and bring up minerals and trace elements for the benefit of other plants nearby, and perhaps most importantly, trees promote a symbiosis between different species of plants both above and below ground, they increase fungal, bird and insect life in the vicinity and thus biodiversity, and provide leaf litter to increase the humus content of the soil. The effect of trees on the wider landscape mosaic (i.e. the diversity and multifunctionality of the land) is also huge.
And through the various forms of agroforestry (see Article No. 1, cited at the beginning of this section), a wide variety of crops and livestock can be maintained sustainably with the help of trees, that is to say, environmentally and socially, as well as economically.
Soil not desert: While not the sole cause, food production is a major driver of desertification today. With the agro-industrial model, to increase productivity, you need to continually use more fertilisers, pesticides, herbicides and machinery, which ironically leads to depletion of soil nutrients and structure, soil compaction, water run-off and pollution, erosion, and eventually to desertification. (Sounds familiar – remember John Steinbeck and The Grapes of Wrath?). It is estimated that around 30% of the world’s productive farmland has been lost in this way, solely over the last four decades, and that this is continuing at an exponential rate, such that there will probably be only around 60 harvests remaining for the industrial system if nothing changes (16).
Soil is Nature’s capital, but it’s less than a metre deep all over the land surface of the globe, and the productive part is only about 20-30cm deep. It is also the major carbon sink – there is more carbon in the soil than in the atmosphere and all plant life combined, including trees (17). So if we destroy it, what happens then?
Fortunately, there is a way out (Nature always provides that) and we need to take a lesson from history! For millennia, people who grew and collected their food in and around the forests understood that Nature had provided us with something we had to look after, the soil. Without transportation, they needed to grow everything close at hand, and they learned that virtually every type of plant had a use – food, fibre, timber, fodder, medicine, fertiliser, shade, etc. – what today we call forest gardening. They understood that tilling the soil wasn’t desirable or necessary, and they learned that Nature had also provided the means for self-fertility, through the natural ecological cycle of producers (plants), consumers (animals and insects) and decomposers (animals, bacteria, fungi). The industrialists seem to have forgotten about all that.
I’m not suggesting we see this as a cure for everything, or that we go back in time, even if it were possible, but doesn’t it sound as if it could be useful if we adapted it more widely for today’s pressing need? It’s really just a question of scale and all pulling together, and it’s already under way anyway. An over-simplification? Maybe, but surely not beyond the bounds of possibility? Here’s hoping.
1. Seabury Consulting (September, 2020). Covid-19: Impact on air cargo capacity. https://www.accenture.com/hk-en/insights/travel/coronavirus-air-cargo-capacity
2. ICAO (2020). Effects of novel Coronavirus (Covid-19) on civil aviation: Economic impact analysis. https://www.icao.int/sustainability/Documents/COVID-19/ICAO_Coronavirus_Econ_Impact.pdf
3. Dionisio, A.P. et al (2009). Ionizing radiation effects on food vitamins – A Review. Brazilian Archives of Biology and Technology, Braz. Arch. Biol. Technol. 52(5):1267-1278.
4. Alperet, D.J. et al (2017). Influence of temperate, subtropical and tropical fruit consumption on Type-2 diabetes in an Asian population. American Journal of Clinical Nutrition, Am J Clin Nutr. 2017 Mar;105(3):736-745. https://doi.10.3945/ajcn.116.147090.
5. European Agroforestry Federation (2020). A brief description of agroforestry in Sweden. https://euraf.isa.utl.pt/countries/sweden/description
6. World Economic Forum (2019). This farmer is saving the jungle by growing food in it. https://www.weforum.org/agenda/2019/08/farming-costa-rica-agroforestry/
7. United States Department of Agriculture (2020). Agroforestry. https://www.usda.gov/topics/forestry/agroforestry
8. The Connexion (2017). Village wins back right to use name on famous knives. https://www.connexionfrance.com/French-news/Village-wins-back-right-to-use-name-on-famous-knives
9. World Health Organisation (WHO) (2020). Obesity and overweight. https://www.who.int/news-room/fact-sheets/detail/obesity-and-overweight
10. Science (September, 2020). Why Covid-19 is more deadly in people with obesity – even if they’re young. https://www.sciencemag.org/news/2020/09/why-covid-19-more-deadly-people-obesity-even-if-theyre-young
11. Bergeaud, A., Cette, G. & Lecat, R. (2018). Long-term growth and productivity trends: Secular stagnation or temporary slowdown? Revue de l’OFCE, 157(3), 37-54. https://doi.org/10.3917/reof.157.0037
12. Health Care Without Harm (2018). Community health risks of industrial agriculture. https://foodcommunitybenefit.noharm.org/resources/community-health-needs-assessment/community-health-risks-industrial-agriculture
13. CAB Reviews (2011). Effects of industrial agriculture on climate change and the mitigation potential of small-scale agro-ecological farms. https://www.researchgate.net/publication/230877696_Effects_of_industrial_agriculture_on_climate_change_and_the_mitigation_potential_of_small-scale_agro-ecological_farms
14. Leakey, R.R.B. (2012). Living with the trees of life. CABI, Wallingford, UK.
15. FAO (2019). Farms, family farms, farmland distribution and farm labour: What do we know today? http://www.fao.org/3/ca7036en/ca7036en.pdf
16. United Nations Convention to Combat Desertification (UNCCD) (2014). The Land in numbers: Livelihoods at a tipping point. https://www.unccd.int/sites/default/files/documents/Land_In_Numbers_web.pdf
17. Yale Environment 360 (2014). Soil as carbon storehouse: New weapon in climate fight? https://e360.yale.edu/features/soil_as_carbon_storehouse_new_weapon_in_climate_fight
No. 2 in an occasional series of articles covering agroforestry-related topics in greater depth
‘Sustainability’ has become a buzz-word in everyday conversation. But I wonder how many of us have thought about what it actually means? If we buy food labelled as organic in a supermarket, for example, does that mean we are supporting a more sustainable form of agriculture? Unfortunately, the answer is probably “no”.
The Oxford English Dictionary defines ‘sustainable’, in the context of development or agriculture, as “not leading to depletion of resources or degradation of the environment”, and I guess that the concept of sustainability has been around since time immemorial, in the sense that humankind has always needed to manage its resources and environment to make sure of the next meal. The word itself seems to have originated in 18th century European forestry to mean never taking more from the forest that it can itself regenerate.
By the 20th century, ecological issues were being more seriously considered, perhaps as a counter to the rise in factory farming, and from mid-century, the scope of sustainability was now accepted to cover the whole range of biological systems, the fact that ecosystems of all kinds needed to continue to operate and maintain diversity in order to regenerate. Implicit within this was the notion that humans need to take care of how they live on the planet, for the benefit of future generations – an important development. In other words, a balance had to be struck between human and planetary needs to ensure that the system was self-propagating. And at the same time the rise of the consumer society brought economic considerations to the fore, another key factor.
So by the beginning of the 21st century, environmental, economic and social needs became the three pillars of sustainability. But in the previous three or four decades, warnings had begun to be sounded about climate change, the rise in CO2 levels and the unbridled depletion of the planet’s resources. This led to several initiatives, one of the most notable being the establishment of the Millennium Development Goals in 2000 (originally with the lofty ideal of eradicating world poverty), which were eight internationally agreed targets for the health of the planet and the populations it supports, including one for ensuring environmental sustainability. These were superseded by the 17 Sustainable Development Goals in 2016, a shift which redefined the MDG’s in the light of lack of progress, and gave greater emphasis to environmental sustainability (see graphic below).
That all seems pretty logical and straightforward you might think; the trouble is, it isn’t, because we are not keeping to our side of the bargain, and the last 100 years or so has seen, and continues to see, an exponential rise in abuse of the natural balance, so that today we are in a situation which demands urgent change. The fundamental rule is broken – we are not living sustainably. Economic considerations and rampant consumerism override environmental and social needs, with the result that the planet can no longer regenerate itself fast enough.
To return to the example at the beginning of this piece, and it is just one example of many, the big supermarkets have allowed economics, marketing hype and profit to dictate their policies, and ‘organic’ is taken to mean elimination or just a reduction in the use of agrochemicals in food production. A good thing as far as it goes, but in order to maintain their margins and the levels of production required for mass distribution, the supermarkets still demand products grown under intensive agriculture, with the use of monocultures, massive amounts of irrigation and poor soil management, for example, quite apart from the human rights and community issues involved in how the labour force is set up and used in many areas – in other words, ignoring environmental and social considerations.
So sustainability really is the bottom line, and of course, it is not all bad news. There are many good things happening all over the world in what is hopefully a general awakening to our plight – for example, the Detroit Black Community Food Security Network, one of several urban ‘agrihoods’ in this troubled Michigan city, or large-scale polyculture farms, and forest gardens.
One word I have noticed being increasingly used, not just around where I live in France, but generally in the media and at the online conferences I attend, is ‘local’. The Covid crisis seems to have stirred something in the public psyche that we need to stop moving produce around the world, with the environmental and ecological upheaval that that entails, and support local production of more nutritious food. I hope it continues.
Further reading: Two books, one from 1962, the other from 1979, which are just as relevant today as when they were first published. Rachel Carson’s Silent Spring was one of the first to highlight the dangers of agrochemicals, and is still regarded as a milestone in environmentalism today. In Gaia, James Lovelock, now 100 and still writing, sets out his theory on the life of Mother Earth (Gaia), and how unsustainable use of the planet’s resources will affect us.
Carson, R. (1962). Silent Spring. Houghton Mifflin (USA) and Hamish Hamilton (UK).
Lovelock, J. (1979). Gaia, a New Look at Life on Earth. Oxford University Press, UK.
No. 1 in an occasional series of articles covering agroforestry-related topics in greater depth
You may have seen in the subtitle to my site the words ‘Small-Scale Agroforestry’. The Forest Garden comes under the broader umbrella of Agroforestry, so it’s perhaps a good idea to begin this occasional series of slightly more technical articles with an explanation of what this is.
In essence, agroforestry is growing crops or husbanding livestock, or both, in among trees, and although today scientists classify it in several forms such as silvo-arable, silvo-pastoral, agro-silvo-pastoral and so on, the principle predates and includes everything we know today (including the nomenclature) by several thousand years, especially in the form of the forest garden, in tropical and temperate areas throughout the world.
Silvo-arable agroforestry is increasingly practised in Europe, the USA and in areas where the severe effects of industrial agriculture are beginning to be acknowledged. It often involves rows of trees in large acreages of arable crops, and farmers are now understanding that, contrary to what was thought only three or four decades ago, the trees have a beneficial effect on soil health and thus the crops, and of course provide an extra crop at the same time. It is a kind of ‘halfway house’, but at least it is a step in the right direction, and there are many other similar initiatives in ‘western’ agroforestry which recognise the need to get away from land degradation and pollution, the decline in yields and in the nutritional value of our food.
Silvo-pastoral agroforestry is where there is pasture land for livestock among random plantations of trees and the classic example of this is the dehesa in south-west Spain and Portugal, where several species of oak (and often other trees) are grown on otherwise ‘unsuitable’ agricultural land and animals are grazed beneath, giving the double benefit of the trees (e.g. cork, acorns, timber, fodder, shade etc) and the livestock (meat and meat products, wool, leather etc). Famously, the Iberian Black Pig (see photo), known for the quality of its meat, is often seen in the dehesa.
There are variations on this theme, large and small, all over the world.
Agro-silvo-pastoral agroforestry is, as the name suggests, a combination of both the above systems, and is the next stage up in reaping the benefits from the land, the trees and the animals, while at the same time beginning to work with Nature, not against it.
The Forest Garden is a small-scale version of all these systems in microcosm, sometimes dubbed ‘hobby farming’, but it is, ironically, the most efficient in terms of yield per hectare, where sometimes hundreds of species are grown together, the sole source of livelihood and food security for millions of people, and the most environmentally and ecologically friendly of the whole lot. It is not only a garden producing food, but also an ecological reserve, where Nature is allowed to show the way, with abundant flora and fauna, where every plant, insect, small and not-so-small vertebrate has a purpose, and where the soil is rendered to optimal fertility without any ‘help’ from us!
The beauty of the forest garden is that it is a multi-layered, vertical system with canopy trees, sub-canopy trees, shrubs, herbaceous plants, ground cover plants, climbing plants and underground plants. The idea that everything has to be set out in neat rows and conveniently spaced and weeded is foreign to the forest garden concept, where everything grows quite happily on top of everything else, providing not only a wide variety of food, but also timber, medicines, fibres, fodder, fences, erosion control, shade, calm and more.
It is ideally suited to the poorer farmer who has only a small area of land and of course, ideal in tropical situations where growth is lush and rapid with an abundance of sunlight. In temperate areas, the forest garden has also existed since antiquity, but in a slightly less prolific form. The First Peoples of North America and Canada still practise it today, for example. With less heat, humidity and light everything grows more slowly, with the result that, in the context of a forest garden, climax vegetation is rare (and in any case closed canopy cover with less light available is not desirable) and mid-succession canopy levels are more the norm (Forest Succession will be the subject of a future article).
All of which has led me to the raison d’être behind the Sombrun Forest Garden Project. The aim of the project is to observe and to mimic natural processes and lend a sympathetic helping hand to speed things up a little, and to help trees and plants help each other, when necessary. For instance, one of the first actions here was to introduce some ‘pioneer’ species of trees (something that happens spontaneously as the first stage of a forest re-establishing itself), which were also nitrogen-fixing species to help with the fertility of the soil, and which in some cases, will provide a windbreak as well.
Agroforestry in all its forms is the sustainable future for nutrition-sensitive agriculture, unless you want to go down the road of Lab Food, and the Sombrun Forest Garden Project is the way I have chosen. I hope you’ll take the journey with me – you’ll just need to be patient!
Further reading: There is a lot of literature available on the subject of forest gardens, which I will be mentioning from time to time. I am intentionally avoiding the denser scientific paper, but here are three useful and interesting books to begin with:
Ford, A., and Nigh, R. (2015). The Maya Forest Garden, Eight Millennia of Sustainable Cultivation in the Tropical Woodlands. Left Coast Press, California, USA.
Crawford, M. (2010). Creating a Forest Garden. Green Books, Dartington, UK.
Jacke, D., and Toensmeier, E. (2005). Edible Forest Gardens. Chelsea Green Publishing, Vermont, USA.
In addition, I have always found the publications of the United Nations Food and Agriculture Organisation (FAO), extremely well-researched and written, and well-presented too. They are freely available online at www.fao.org/publications. A good example is The State of the World’s Forests 2020, just published and a mine of information!