Sustainable Farming

The Government of India just released a "State of the Environment" report. I can't find the original report, but there is a lot of coverage:

BBC News:

The State of the Environment report says that at least 45% of India's land area is "degraded due to erosion, soil acidity, alkalinity and salinity, water logging and wind erosion".
...
in the past, a combination of rainfall and surface and groundwater supplies were sufficient for the population. But now it says that rainfall has become more erratic, groundwater supplies are becoming more depleted and surface water is becoming more polluted.
...
"with an economy closely linked to a natural resource base", India faces big challenges in the future including a scarcity of water and lower crop yields.

IBN:

...the level of respirable suspended particulate matter--the small pieces of soot and dust that get inside the lungs--had gone up in all the 50 cities across India studied by the All India Institute of Medical Sciences and the Central Pollution Control Board.
...
10 percent of its wild flora and fauna are on the threatened list... The main causes, according to the report, were habitat destruction, poaching, invasive species, overexploitation, pollution and climate change.
...
about 700 million Indians directly face the threat of global warming today, as it affects farming, makes droughts, floods and storms more frequent and more severe and is raising the sea level.

On the plus side:

over two-thirds of the degraded 147 million hectares can be regenerated quite easily, ... and India's forest cover is gradually increasing
...
India contributes around 5% of global carbon dioxide emissions. That is about a quarter of the emissions of China and the US. ... Indian per capita emissions are one-twentieth of the US and one-tenth of Europe and Japan.

We've read a while ago that even many environmentalists think of the corn-belt style agriculture as a necessary evil, to be tolerated so that the environment elsewhere can be protected. I've personally heard this argument from a very well educated and knowledgeable friend. This just goes to show that Big Food propaganda machine has been very successful.

Propoganda - Sustainable agriculture is "low-yield":

A typical claim of the industrial apologists is that the industrial style of agriculture has prevented some 15 million square miles of wildlands from being plowed under for "low-yield" food production. ... They also claim that if the world does not fully embrace industrial agriculture, hundreds of thousands of wildlife species will be lost to low yield crops and ranging livestock.

There is overwhelming evidence of higher productivity and efficiency of small, biodiverse, low mechanization, petro-chemical free agriculture (see also here and here). Can anybody really believe that industrial agriculture and factory meat-farming, which are net destroyers of energy, water, and soil can benefit the environment in any way?

...sustainable or alternative agriculture minimizes the environmental impacts of farming on plants and animals, as well as the air, water, and soil, often without added economic costs. ... Organic and diversified farming practices increase the prevalence of birds and mammals on farmlands and ensure biological diversity for the planet.

Poisoning the environment:

Pesticide use - endemic to industrial agriculture - has been clearly identified as a principal driving force behind the drastic reduction in biodiversity on America's farmlands. .... there are no fewer than 50 scientific studies that have documented the adverse environmental effects of pseticide use on bird, mammal, and amphibian populations across USA and Canada.
...
Chemical fertilizers - which are also a key component of industrial agriculture - pose an even greater risk to soil and water quality... Aquatic and marine life are especially vulnerable to the tons of residues from chemically treated croplands that find their way into our major estuaries each year.

Wildlife habitats:

... the huge, monocultured fields characteristic of industrial agriculture have dramatically reduced the wildlife populations by transforming habitats, displacing populations of native species, and introducing non-native species. ... Diversified farming techniques, on the other hand, incorporate numerous varieties of plants, flowers, and weeds, and encourage the proliferation of various wildlife, insect, and plant species.

No myth can hide the fact that decades of industrial agriculture have been a disaster for the environment. Its chemical poisoning has caused eco-cide among countless species. ... the tilling, mowing, and harvesting operations of industrial agriculture have affected, and continue to catastrophically destroy wildlife, soil, and water quality.

Along with the illusion of abundance, supermarkets create an illusion of choice (40 types of breakfast cereals! 60 varieties of juices!). However, if you look at the ingredients, this illusion breaks down rapidly.

The illusion of the package:

Each year, more than 15,000 new food products come to market in the U.S. ... However, these introductions rarely represent an increase in food choices for the consumers. The packages attempt to hide the fact that we are essentially increasing the same set of ingredients over and over, even though they go by different names. ... a full 95% of the calories we eat come from only 30 varieties of plants.

The loss of diversity:

By growing all our crops in monoculture, industrial agriculture not only limits what we can eat today, but also reduces the choices of future generations. ... a study of the seed stock readily available in 1903 vursus the inventory of the U.S. National Seed Storage Laboratory... found an astounding loss of diversity: we lost nearly 93% of lettuce, over 96% of field corn, about 91% of field corn, more than 95% of tomato, and almost 98% of asparagus varieties.

"Big Food" dictates what we eat:

A handful of companies own most of the food brands in the market. For example, Kraft Foods, (the second largest food company in the world, after Nestlé) owns around 150 brands worldwide. Large food manufacturers have also been acquiring and introducing organic brands.

Why does this matter?

The goverment, bending under pressure from agribusiness, has never required labels that inform consumers about pesticides and other chemicals used on crops, or the residues still left on those foods at the time of purchase. ... "nuked" processed foods are not labled*. ... under pressure from the biotechnology industry, [the U.S. FDA] has decided not to require genetically engineered foods to be independently safety tested or labled. ... Agribusiness not only uses its political muscle to prevent food labling, it also has pushed through laws to stop critics from getting importnat information about food to consumers ... [by pressuring] 13 states to pass "food disparagement" legislation.

What's the alternative?

By choosing ... local, small-scale organic farming ... we could not only give ourselved the choice of safe and healthy food and a cleaner environment, but we could also incorporate literally thousands of ddifferent varieties and tastes into our diets.

*For the latest on food irradiation labling, see here.

I have been reading quite a few books in the past month or so, mostly on academic research towards increasing agricultural sustainability. While most of these are probably not of interest to non-academicians, the general message is that making small scale changes, using appropriate technologies, and incorporating biodiversity to utilize and enrich local natural resources is the way forward.

One of the books that everyone should read is Fatal Harvest: The Tragedy Of Industrial Agriculture.


Written by world renowned scientists, activist, and thinkers, Fatal Harvest is a comprehensive and eye opening exploration of the biological, ecological, and social aspects of managing land for long term sustainability and productivity. Wendell Berry, Vandana Shiva, and Miguel Altieri are some of the contributing authors.

The individual essays are grouped in seven sections -

1. Farming as if Nature Mattered: Breaking the Industrial Paradigm
2. Corporate Lies: Busting the Myths of Industrial Agriculture
3. Diversity, Scale, and Beauty: Contrasting Agrarian and Industrial Agriculture
4. Industrial Agriculture: The Toxic Trail from Seed to Table
5. Biodiversity and Wildlife: The Overappropriation of Wildlife Habitat by Agriculture
6. A Crisis of Culture: Social and Economic Impacts of Industrial Agriculture
7. Organic and Beyond: Revisioning Agriculture for the 21st Century

Sections two and seven are probably the most important ones from the point of view of raising awareness. 'Corporate Lies' methodically disproves the common propaganda about the benefits and inevitability of industrial agriculture, while 'Organic and Beyond' reviews the current and future efforts required for feeding the growing global population in a sustainable manner. (In the next few posts, I'll summarize the 'Seven Deadly Myths of Industrial Agriculture'.)

Along with the highly readable, informative, and thought-provoking text, the many beautiful photographs (often contrasting industrial and sustainable approaches) in Fatal Harvest get the point across. All these articles and photos do make the book quite large (15 x 12 inches!) and heavy though.

If you want a more mobile version, try the The Fatal Harvest Reader, which is a condensed version of the book, (and sans many of the photographs), as well as the Fatal Harvest website.

It's unbelievable that I have managed to not discuss guilds, the quintessential permaculture concept, for so long on this blog! We have discussed them indirectly by considering beneficial interdependence, sunlight harvesting, and complex systems with multifunctional components. But, without any more delay:

Simply put, a guild is a combination of plants and animals, where each plant or animal performs one or more beneficial functions. As these plants and animals are selected to fulfill each others' requirements, the system becomes almost entirely self-managing, requiring no external inputs and very little labor apart from harvesting.

I've found a couple of very well written descriptions of guilds, so let me just quote from them -

Stacia and Kristof Nordin of NeverendingFood write:

A good Permaculture guild generally has seven components:

• Food for us
• Food for the soil
• Diggers/Miners
• Ground Cover
• Climbers
• Supporters
• Protectors

Read their full description here.

Meg Howe and Graeme Young of Small Farm Permaculture and Sustainable Living describe guilds as:

A guild in Permaculture landscape design is a harmonious assembly of species (plant or animal) physically associated with a central plant or animal species to provide it with some benefit.

The range of benefits that can be derived from guild species include:

• Providing mulch
• Offering shelter and protection from frost, wind or sun
• Hosting predators
• Remove pest habitat
• Prey on or deter pests
• Killing root parasites or pests
• Providing nutrients
• Facilitating root penetration

Read their full description here.

Masanobu Fukuoka, in 'The Road Back to Nature':

I don't plow my fields, but I do sow clover. This is the easiest way there is to grow rice. With the arrival of spring, the clover grows thick and fast. I sow rice seed in this clover and later flood my field to weaken the clover and favor the rice. Then I drain the water and leave the field to itself.
...
A week or two before harvesting the rice, I take anywhere from about four to ten quarts of barley seed, place it in a basket, and scatter it over the field. This also takes about an hour. After the rice is harvested and threshed, I scatter the straw back over the field.
...
The straw and clover do more for the fertility of the soil than large tractors. So this is certainly not a primitive method of farming from the past. It may seem primitive if all you pay attention is the the word "no-till," but it is in fact a biological method of farming that uses plants and animals rather than heavy machinery. If you think of this as a means for raising soil fertility using microbes, as cultivation with plant roots, then it becomes the most advanced science.

(p217 and p223, 1987, Japan Publications Inc, New York*)

The goal of sustainable farming is not to farm in a primitive manner and be satisfied with low yields, but rather to get the highest possible yields with lowest energy and effort input, and to improve the local natural resources at the same time. To do this, we need to use natural components to create the most stable, productive, self managing systems and then avoid interfering with the natural processes.

* I will post an overview of 'The Road Back to Nature' soon. The excerpt above is quite atypical for the book, which, while certainly worth reading, primarily examines the philosophy of farming and modern lifestyles in Japan and Europe and America (with a healthy dose of 'get-off-my-lawn'!). Fukuoka's 'The Natural Way of Farming' is the one that has detailed information on natural farming techniques.

Also, when Fukuoka speaks of 'sowing' he means just scattering seeds on the field, rather than drilling them in the ground. The rice is also not transplanted from growing beds.

The Farm as Natural Habitat: Reconnecting Food Systems With Ecosystems is written by a group of professional farmers, journalist, ecologist and biologists, most of them from the mid-western United States. This is somewhat surprising, since this area is the "corn belt" of America, with vast monoculture plantations of corn and soy-beans, factory farmed animals, and little else. Even most environmentalist consider this area an environmental sacrificial zone, since these vast monocultures are purportedly critical for "feeding the world".

The Farm as Natural Habitat critically examines this status-quo from various angles, and gives numerous examples of eco-friendly and sustainable farming operations in the corn belt that conserve the local land, improve water quality and wildlife habitat, and are highly profitable. Not all of these farms are completely organic, and since they are on the order of hundreds of acres, most of them use machinery to some extent.

The book covers the issue of protecting and promoting biodiversity on farms in four parts:

1. Agriculture as Ecological Sacrifice
2. Restoring Nature on Farms
3. Ecosystem Management and Farmlands
4. Steps Towards Agroecological Restoration

The first part reviews the current necessary-evil approach to the monocultures and factory farming in the corn belt, and demonstrates that this is not necessary, and is not sustainable in the long run:

• We should conserve biodiversity not just due to ethical and aesthetic reasons, but also because the natural ecology of an area provides us with tremendous value in natural resources that can not be replaced artificially at any cost once the ecosystems are damaged.
• While the sacrifice is made in the name of "feeding the world", in reality, about 80% of the grain produced is used as animal feed benefiting only the first world. In fact, world hunger has consistently worsened despite increasing monoculture in the corn belt.
• And of course, there are numerous catastrophic effects on human health and on the environment due to the industrial approach to agriculture and the associated diet and lifestyle.

The second and third parts review several examples and approaches used by farmers to run highly profitable farms by incorporating biodiversity and eco-friendly practices. The key here is active and unbiased observation of natural systems on the land, and working with the natural ecosystems rather than imposing the latest agri-science fashion. Part four examines the conceptual, social and regulatory shifts necessary for making large scale eco-friendly agriculture a reality. (Perhaps some of the shifts are now happening, like the proposed low-carbon agriculture subsidies.)

The book is written for the lay-person, and most of the data is presented in terms of direct examples, but at the end of each chapter there are a large number of references to books, academic and policy publications, etc. Certainly worth reading for anyone interested in the future of agriculture in the coming low carbon economy.

One of the few bits of knowledge I will remember forever from when I was studying to be a metallurgist* can be summarized** as:

The action is always at the interfaces.

The interfaces, or edges, between two different systems are an extremely important concept when setting up a sustainable agricultural system too. Due to the sudden change in system properties, interfaces are highly active zones, with energy and materials continuously in flux. Life takes advantage of these energy and material exchanges, and thrives far more easily at these discontinuities than in the more homogenous interior of an area. For example, the most biodiverse and productive sites in an ocean are near the shores as well as where cold and warm ocean currents meet. Comparatively, the open ocean is akin to the Sahara desert in terms of biodiversity and productivity.

In permaculture design, increasing the amount of edges is an important tool for maximizing the productivity of a farm. Specifically, ponds are designed with an irregular shape (as opposed to circular) to maximize the water's edge. Wooded and grassland areas are intermingled. Of course, since the biodiversity is high in any area, there are a lot of micro-interfaces where different organisms interact. All of this improves the resource efficiency and productivity of the designed ecosystem.

The corollary is reducing the interface area when you want to minimize material use and energy exchange. For example, spherical structures have the least surface areas for a given volume, and are thus the most energy efficient for heating and cooling***.

The edge effect isn't limited to the physical phenomenon**** - the most innovative scientific research happens in interdisciplinary fields (and of course, at the boundary between knowledge and ignorance). Some of the most interesting art and music and literature happens where two different cultures or ideologies meet.

So here's to the fringes. They make the world more exciting and productive!



* 1998-2002. Feels like lifetimes ago!

** For those who want a fuller explanation: The things we use every day (alloys, composites, etc) are made of different combinations of elements and compounds. In metals and alloys, the functional units of the material are crystallites (or grains). A huge fraction of the properties of the material (strength, ductility, conductivity, thermal properties) is attributable to the microstructure, and specificlly the grain boundaries. These discontinuities in the material are high energy sites, and influence the behavior of the material tremendously. Almost all of the thermal and mechanical treatments affect the properties of materials by increasing or decreasing the size, shape, distribution, and energy of the grain boundaries.

Control over the microstructure and boundaries is also very important for controlling the properties of polymers, ceramics, semiconductors and composites.

*** I also remember reading that ancient human dwellings progressed from round to rectangular as prosperity increased, and reverted to round shapes in times of prolonged scarcity. Can't find any references right now. Anyone?

**** Also read the post Some Thoughts on Edge on the Permaculture Reflections blog.

The conventionally preferred farmland is a flat piece of land that has easy access to water and is free of large rocks and boulders. Any variations in a landscape are often removed at great expense to reach this ideal. This is of course due to our preference for using animals and machines for doing the work, and growing single crops over large areas.

In fact, the variations in a landscape are a great asset for creating a rich, productive environment.

In a natural landscape, the variations and gradients in topography, orientation, soil structure, and mineral concentration create a variety of niches where different organisms thrive. Combined with natural cycles (seasons, day and night), these gradients give rise to energy and material fluxes through the landscape. These fluxes further specialize the niches, creating the right conditions for a diverse ecosystem. As we know, biodiversity is at the heart of creating a stable, efficient and productive ecosystem.

In permaculture, these gradients, cycles and patterns are observed and utilized for maximizing biodiversity and for situating plants, buildings, and other structures at the appropriate locations.

Water, often the limiting resource in an ecosystem, is a good example. We already saw how swales and ponds are a good tool for rejuvenating a landscape. They are especially important in Asia and Africa, where highly seasonal rainfall and temperature variations often lead to a marked dry season. Swales and ponds built on a natural slope harvest water with only small changes in the landscape, and make the rainwater available more uniformly through the year. By locating them properly, ponds can also reflect light towards plants, improve humidity, and make the local climate more moderate. Furthermore, swales and ponds create more niches in the landscape by introducing a water content gradient - water, water's edge and moisture gradients in the soil. Once you locate the plants according to their water needs, you don't need to waste energy on irrigation.

Similarly, by studying the patterns of wind, sunlight and natural animal movement, a permaculture site can be optimized to make it not only more productive, but also more habitable for humans, plants, and animals. With all these possibilities, why would you want a featureless land for a farm?

One of the major differences in conventional agriculture and natural ecosystems is in the number and complexity of components. Conventional agriculture is a fairly simple and linear system with very few components and pathways. In contrast, natural ecosystems are highly complex with hundreds, if not thousands of active components (microbes, insects, plants, animals) as well as numerous pathways through the system for energy and materials.

The needs of each component in a natural ecosystem are fulfilled by the outputs of multiple components, and in return, each provides multiple useful inputs for others. Furthermore, each need can often be fulfilled through multiple pathways. These needs are not only material requirements like nutrients and water, but also environmental requirements, like the right amount of sunlight, humidity, pest control, pollination and physical support.

This complexity has two direct benefits -

1. Since everything is useful for something else, there is no 'waste' in the system, increasing energy and resource use efficiency.
   
2. Due to multiple pathways for fulfilling each need, removal of a few components does not debilitate the system.

Thus, a complex system with multifunctional components remains stable and productive with only sunlight, water and air as inputs. Conversely, it is precisely because we insist on keeping farms in an unnatural, simplified state that we need vast amounts of energy and labor for growing food in the conventional manner.

In permaculture, such complexity is intentionally designed into the system, creating a "food forest" with as many as 500-600 plant species, a few domesticated animal species, and attracting a large number of beneficial wild insects and birds. With this approach, a permaculture farm can produce an abundance of food practically throughout the year, without any chemical or mechanical inputs, and requiring far less labor than a conventional farm.

We need to shift our point of view significantly to realize how this is possible - we know that managing a farm with five plant species takes work. Managing a farm with fifty productive plant species will probably take even more work. What is perhaps a little un-obvious is that a farm with hundreds of plant species, a number of animal, and numerous insect and bird species can be completely self regulating and self sufficient, provided the components are chosen well to work together with each other and the local climate and landscape:


On a related note, the BBC series 'Natural World' recently showed the documentary A Farm for the Future, produced by wildlife film maker Rebecca Hosking:

Realising that all food production in the UK is completely dependent on abundant cheap fossil fuel, particularly oil, [Rebecca] sets out to discover just how secure this oil supply is.

Alarmed by the answers, she explores ways of farming without using fossil fuel. With the help of pioneering farmers and growers, Rebecca learns that it is actually nature that holds the key to farming in a low-energy future.

If you're in the UK, you can watch this program on the internet. Otherwise, it may be available on your local BBC channel.

In the last three posts, we saw that the major goal of permaculture (as well as natural farming and other sustainable land use practices) is to create a highly efficient and productive ecosystem by utilizing sunlight, land, and rainfall* to the maximum extent possible. The techniques of permaculture, like swales-and-ponds, mulching, or creating a 'layered' food forest, are derived from a few underlying themes.

Once we understand these themes, it is easy to design own low input highly productive systems, even in small urban spaces:

Designing the system with beneficially interdependent components is a major themes underlying permaculture design. This applies not only to interdependence between biological components (plant guilds, plants and bees, or plants and birds), but also to biological and nonbiological components. For example, plants grown on swales reduce erosion of the swale and in return get a dependable source of water.

The other important interdependence, of course, is between the human and natural components of the land. This includes using the waste products of human activities as feed/mulch/compost/manure for the the natural systems, and in return getting a better harvest from the plants and animals.

It is also important to reduce harmful relationships in the ecosystem. This includes increasing the distance between plants that may hurt each other chemically or physically, situating non-biological and biological components to minimize harmful effects of temperature and humidity, etc.


* I should mention maximum utilization of air too! Apart from water, practically all the biomass on the land is the carbon and nitrogen captured from air.

The third critical component in the natural world is sunlight. On conventional farms, orchards and agro-forests, there is usually only one primary plant species, and sometimes a secondary species, in any given area. Furthermore, a significant fraction of the land is directly exposed to sunlight either between plants or between harvesting and the next planting.

Contrast this with a natural forest, where there are multiple species of plants, each growing to a different height, and adapted to thrive in different intensities of sunlight. As a result, the ground in a mature forest is almost completely dark.

Permaculture design aim to replicate this phenomenon as much as possible on a farm, by creating a 'layered' system. The maximum harvesting of sunlight increases the total yield of the land. Considering that plants are the best solar harvesters we have till date, and that they provide a lot of indirect services along with the food or material harvested, it is imperative that we start employing solar intensive permaculture practices everywhere.

Also see:

• This previous post: Re-Solarizing Farming
• A post on another blog about a farm in Goa (India) that is "harvesting sunlight"

Permaculture is a popular method of sustainable agriculture management. In this method, the agricultural potential of an area is maximized by

• completely utilizing the resources - sun, water, and land
  
• by making small modifications to the landscape
• and introducing a large variety of productive and interdependent plant and animal species to occupy all niches, creating a high biodiversity environment
  

What does such a landscape look like? The short video below shows the established food forest on the Permaculture Research Institute campus*:


Bill Mollison, the founder of the permaculture movement, gives an overview of the set-up sequence of a typical food forest in this blog post:

Thus the phases of abundance in tropical – subtropical systems of from 1-2 acres upwards in wet seasons could be:

• Season 1. Establishment of an abundant richness of species for trial.
• Season 2. An abundant source of propagation material is produced.
• Season 3. Several species are sufficiently numerous to provide an abundance of yield.
• Season 4. Yield is excellent, propagation material “unlimited”, and slower species start to produce. Absolute abundance is achieved.
• Season 5 on. Abundant yield from as many as 30 perennials and the same number of annuals is achieved, and can be made to persist for as long as is needed.

* You can buy the DVD here.

In traditional and modern farming, pesticides and herbicides or manual weeding are a given. This is fighting life with death, and in a real world farm, practically the definition of a Sisyphean struggle.

In a conventional farm, the soil is tilled and fertilized, and between the plants and crop rows, left bare! It is only inevitable that whatever seeds that fall on this ground will germinate and grow vigorously. Inevitably, these will be seeds of non-crop plants. Pulling out weeds by the root only creates habitats for more weeds.

Insect infestations are also invited due to the monoculture on most farms - insects proliferate rapidly in the presence of the abundant food supply, and the variety of natural predators is also low due to the artificially non-diverse ecosystem. The use of insecticides kills all insects and spiders, creating an ecological vacuum where insect population explosion down the line in inevitable.

These toxic chemicals inevitably enter the food supply, persisting and accumulating in the human body over time. And of course, the monetary, energy, and labor costs of these chemicals are enormous.

Actively increasing the plant biodiversity on the farm with a large variety and types of plants, including nitrogen fixing ground cover, takes care of both of these problems. With a beneficial cover crop, the weeds are naturally out-competed, and the few that may to take hold serve to increase biodiversity. It is important to remember that weeds occupy completely different ecological niches from crops, and so don't usually compete with them for resources. Due to the diversity of plants and absence of poisonous chemicals, frogs, lizards, spiders, etc. thrive, and naturally control the insect population.

Thus, expensive, harmful, and labor intensive interventions are not necessary for controlling pests, and life can be controlled with life far more easily. In his own words, here is Fukuoka explaining why pesticides and weeding are unnecessary.

A natural farm is:

• a complex, self-regulating, designed ecosystem
• where a large variety of plants, animals, insects, birds and microorganisms are nurtured
  
• with minimal physical intervention
  
• and no chemical inputs
  
• to produce abundant food and other resources for human consumption
• while enriching the local natural resources.

Natural farming requires significantly less labor than traditional low resource agriculture, and none of the chemical fertilizers, pesticides and costly machinery necessary in modern commercial monoculture. Despite the low inputs, the yields of well-managed a natural farm consistently equal or better those of the best modern farms.

Does the high efficiency of natural farming sound like a fantasy? In fact, over the past few decades, natural farming approaches have been independently developed and demonstrated numerous times in many different environments. Fukuoka Farming and Permaculture are the most popular and best systematized.

On this blog, I will explore the small farm and ecosystem crises in the developing world, and how natural farming can provide solutions.

The time to act is now.