"Can
we rely on it that a ‘turning around' will be accomplished by enough people
quickly enough to save the modern world? This question is often asked, but
whatever answer is given to it will mislead. The answer "yes" would lead to
complacency; the answer "no" to despair. It is desirable to leave these
perplexities behind us and get down to work." E.F. Schumacher, Small is
Beautiful

I would rather have titled this essay "Where the Hoe Meets
the Soil" but that phrase is not part of our cultural lexicon, which is itself
a symptom of the problem I am working to address. Setting aside any prolonged discussion of
whether or what about the modern world should be saved, this essay is primarily
about what it means to "get down to work" as Schumacher puts it. But very quickly, to me saving the modern
world means setting a goal for the human economy to be properly scaled relative
to the global ecology, and maintaining a sufficiency of social stability
necessary to manage a transition.

Before getting to work, I want to make sure the work I do is
useful. This is where a clear
understanding of the big picture helps.

Ecological Economics

The question of proper economic scale is examined by the field of ecological
economics. In the ecological economics
model, the human economy is a subset of the Earth system, and therefore the scale
of the human economy is ultimately limited.
The human economy depends upon the throughput or flow of materials
from and back into the Earth system.
Limits to the size of the human economy are imposed by the interactions
among three related natural processes:

(1) The capacity of the Earth system to supply inputs to the human economy
(Sources),

(2) The capacity of the Earth system to tolerate and process wastes from the
human economy (Sinks), and

(3) The negative impacts on the human economy and the resources it relies on
from various feedbacks caused by too much pollution.

Fig. 1. The ecological economics model
of the relationship between the human economy and the Earth system highlighting
the importance of sources, sinks, feedbacks and scale.[i]

For an expanded look at the relationship between our economy and the planet
see the engaging on-line film "The Story of Stuff."[ii]

One measure of whether the human economy is too large is the
ecological footprint (EF), which calculates on a nation-by-nation basis the
consumption of resources and the build-up of wastes relative to resource regeneration
rates and the waste-absorbing capacity of the environment. According to two independent EF analyses (which
I will call EF 1 and EF 2) the human economy (population plus consumption and
waste generation) is in a state of overshoot, meaning it is too large relative
to the long-term capacity of the planet to cope.[iii] The Earth can provide for us beyond its means
for a long time before the consequences become severe, just like a millionaire
can, for a time, live high on the principal in a savings account instead of the
interest. The degree to which we are
drawing down principal as opposed to living on interest is called our
"ecological debt."

Figure 2. Change in
ecological footprint over time according to EF 1 with our cumulative ecological
debt in blue.[iv]

Getting More Specific:
Fossil-fuel Depletion and Climate Change

Indicators like the ecological footprint are important for
understanding we have a problem and giving us a sense of the scale, but they
aren't very specific. In order to do
something about reducing our footprint, it would help to know what is causing
the ecological footprint to be so large.
A significant portion of the ecological footprint represents consumption
of fossil fuels and the resulting waste, mainly greenhouse gases. The "carbon" footprint component is about 52%
for EF 1 and the similar "energy land" is 88% for EF 2.[v] According to EF 2, "energy land" is 93% of
the North American footprint. A priority
on reducing fossil fuel consumption appears justified. The human ecological footprint can be lowered
below "1 Earth" only by eliminating the pollution from fossil fuel
combustion.

EF analysis uses the capacity of the environment to absorb
greenhouse gas emissions, which, as seen in the model shown in Fig. 1, means EF
measures "sink" capacity. The real
picture is more complex and more disturbing for a couple of reasons. Firstly, fossil fuel extraction is reaching
limits sooner than expected. Since we
have not been weaning our economy off fossil fuels steadily for the past few
decades, rapid energy price inflation will likely make it difficult to maintain
the kind of economic vitality and stability needed for a smooth transition to
renewable energy alternatives. Secondly,
recent evidence suggests that climate change is happening faster than
expected. Ice sheet destabilization is
one major indicator that the Earth system is more sensitive to greenhouse
emissions than most scientists and policy-makers have presumed. Recent articles by Kurt Cobb[vi]
and Richard Heinberg[vii]
review all these points, and the "Climate Code Red" report[viii]
goes into truly excruciating detail so I won't elaborate further here.

The bottom line is that every measure must be taken to
rapidly eliminate fossil fuel consumption and dependency in every component of
our lives. The key word is
"rapidly." Don't passively assume
inexpensive alternative energy substitutes will arrive to replace fossil fuels-we
may have waited too long to respond to have a smooth transition. Therefore, focus most attention on reducing
energy demand rather than substituting a new energy supply. And finally, in the context of ecological
economics, fossil fuel depletion and climate change, ask whether what you do in
your life, vocation, hobbies, and habits, contributes to the long-term function
(or dysfunction) of society.

The U.S.
Food System and Fossil Fuels

It would be hard to argue against a claim that a secure and
healthy food supply is indispensable to society. A widely known and troubling fact is that the
current food system in the U.S.
(and most highly industrialized nations) is very dependent upon fossil
fuels.

As far as I am aware, the most comprehensive study on the
topic of energy use in the U.S.
food system is by Heller and Keoleian of the University of Michigan's
Center for Sustainable Systems.[ix] The report is from 2000 and makes use of data
from the mid-1990s. Although the data
are about 10 years old, I don't believe the basic structure and function of the
U.S.
food system has changed dramatically over the past 10 years. In fact, current trends of increased
industrial meat consumption[x]
and biofuels[xi], which
both rely on grains, make the following case even stronger.

We learn from the study that over 10% of the energy
consumption in the U.S.
can be attributed to the food system, and that about 20% of this occurs in the
agricultural production sector. Home
energy consumption (e.g., refrigeration and cooking) consume the largest share
at about 30%. Between the farm and the
home are everything else (transportation, processing, packaging and
retail). Much of this middle portion is
a function of the geographic disconnection between production and
consumption. Eating food out of season
either requires long-distance transportation or energy demanding
processing. Both transportation and
processing require investments in storage.

Sorting out the proper scale of operations for farms,
processing and transportation systems is very difficult, however, because optimization
for one factor (e.g., transportation), may be sub-optimal for another (e.g.,
heat intensive food processing). Within
a category, such as transportation, the technologies analyzed may be limited
too. A study comparing rail cars, large
semi-trucks and small produce trucks may conclude that bigger is better, but
what about hyper-local transportation systems using bikes, small electric
vehicles and bipedal locomotion? Another
complicating issue is that studies may assume the U.S. food system should be more or
less similar in its mix of products while lowering energy consumption. For example, tomatoes can be processed using
canning or drying. Canning lends itself
to centralized operations and so does drying if fossil fuels are used as heat
sources. But a naturally decentralized
and fossil-fuel free technique such as passive solar dehydration may not even
be considered. Large energy savings can
be found everywhere in the food system, but especially so if assumptions about scale
and consumer-level demand are allowed to change.

Fig. 3. The energy
inputs to the U.S.
food system are several times larger than the energy content of the food. A life-cycle analysis identifies how energy
consumption is partitioned among economic sectors.[xii]

Another graphic from the Heller and Keoleian report clearly
identifies a huge savings potential.
Over 50% of U.S.
grains are fed to domestic animals, and most export grains go to animal feed as
well. Overall, only 26% of U.S. grain
production in 1995 went to domestic human consumption.

Although poultry need grains, red meat and milk products
dominate the feed market and grains are not a natural part of their diets. If red meat and dairy production were reduced
to only what harvested hay and pasture could provide, perhaps half of annual U.S. grain
production could be eliminated. The
acreage out of food production could be used for green manure crops to build
soil and fix nitrogen. A 2004
Congressional Research Service report showed that fertilizers are the largest
part of farm energy use, and that natural gas to produce nitrogen comprised
75-90% of the fertilizer input (Fig. 5).[xiii] Fixing nitrogen naturally, therefore, saves
significant energy. Some of the vast
cropland area no longer producing grains could then be used for appropriately
scaled biofuels to power farm equipment instead of fossil fuels.

Fig.
4. A reprint of Fig. 3 from the Heller
and Keoleian report. See graph label
above.

Fig.
5. A reprint of Fig. 2 from a 2004
Congressional Research Service report.
See graph label above.

An older and less comprehensive on-line
review paper[xiv] titled "Energy Use in the U.S. Food System: a summary of existing research and
analysis" by John Hendrickson of the Center for
Integrated Agricultural Systems, UW-Madison concluded that:

"It appears that some of the greatest
saving can be realized by:

• reduced use of petroleum-based fertilizers and
  fuel on farms,
• a decline in the consumption of highly processed
  foods, meat, and sugar,
• a reduction in excessive and energy intensive
  packaging,
• more efficient practices by consumers in shopping
  and cooking at home,
• and a shift toward the production of some foods
  (such as fruits and vegetables) closer to their point of consumption."

Hendrickson's paper is helpful in republishing and comparing
tables from many previous studies, including "Table 5" reprinted here on the
energy consumption of home grown versus market-purchased fruit and
vegetables.

Taking Responsibility: Brookside Farm Examples

With this extensive background I introduce the project I
have been working on for about two years now, Brookside Farm. This is a 1-acre mini-farm in Willits, CA. It operates as a program of the non-profit
corporation North Coast Opportunities, functions as a working farm with a
community supported agricultural program serving 15 "shares" per year, exists
at an elementary school and is therefore open to classes and tours, and
conducts research and demonstrates aspects of a local food system with the collaboration
and support of Post Carbon Institute.[xv]

Brookside Farm thinks about food from a "farm to fork" and
back again perspective. Farmers create
artificial ecosystems, and we therefore look to ecology to guide our
practices. Highly productive and stable
ecological systems are noted for a diversity of species both in kinds and
functional forms. When these diverse
species interact effectively, they maximize the rates of productivity and
nutrient retention in the system using ambient energy sources. We view ourselves as human members of the farm
ecosystem with our labor and wastes as parts of the whole.

To get by on ambient energy as much as possible, we have
sought alternatives to fossil fuels in every aspect of the food system we
participate in. Table 1 considers each
type of work done on the farm, to the fork, and back again and contrasts how
fossil fuels are commonly used with the technologies we have applied.

Table 1. Feeding
people requires many kinds of work and all work entails energy. In most farm operations the main energy
sources are fossil fuels. By contrast,
Brookside Farm uses and develops renewable energy based alternatives.

Our use of food scraps to replace exported fertility also
reduces energy by diverting mass from the municipal waste stream. Solid Waste of Willits has a transfer station
in town but no local disposal site. Our
garbage is trucked to Sonoma
County about 100 miles to the south.
From there it may be sent to a rail yard and taken several hundred miles
away to an out of state land fill.

We are also planning to irrigate using an on-site well and a
photovoltaic system instead of treated municipal water or diesel-driven
pumps.

How much energy does Brookside Farm
save?

The complexity of the food system makes it difficult to
calculate how much energy Brookside Farm is saving. A research program at UC Davis now devoted to
just this sort of question is recently underway, but with few results to share
thus far.[xvi]

From previous studies we can find clues about the high
energy inputs to fruit and vegetable cultivation. From Fig. 4. above, we can see that fruits
and vegetables account for (102,370/921,590) 11% of crop production by weight. Table 3 (given below) of the Congressional
Research Service report shows that energy invested in fruit and vegetable
production is proportionally higher, accounting for (3759/18364) 20% of the
energy for crops at the farm level.

Much of the savings at Brookside Farm occurs off the farm by
replacing what would normally be imported, through passive solar preservation
and storage techniques, and by shifting consumer habits towards seasonally
fresh cuisine proportionally high in vegetables.

Does Brookside Farm Scale? Lawns to Food

Before it was Brookside Farm, it was a field of mostly grass
at an elementary school. The school
district watered and mowed it (Fig. 6).

Fig. 6. Brookside
Farm in early spring, 2007. The image
shows the farm site adjacent to the forest and bordered by grassy fields,
school buildings and a residential neighborhood. Arrows from a home contrast distance and
direction of food coming from the local Safeway supermarket and Brookside
Farm. The 1 acre Brookside Farm occupies
about a quarter of the available play field at Brookside Elementary School.

Using satellite imagery, the area of lawn in the United States
has recently been estimated:

"Even conservatively," Milesi says,
"I estimate there are three times more acres of lawns in the U.S. than irrigated corn." This means
lawns-including residential and commercial lawns, golf courses, etc-could be
considered the single largest irrigated crop in America in terms of surface area,
covering about 128,000 square kilometers in all.[xvii]

The same study identifies where and how much water these
lawns require:

That means about 200 gallons of
fresh, usually drinking-quality water per person per day would be required to
keep up our nation's lawn surface area.

Let me put the area of lawn from this study into a food
perspective. The 128,000 square
kilometers of lawns is the same as 32 million acres. A generous portion of fruits and vegetables
for a person per year is 700 lbs, or about half the total weight of food
consumed in a year.[xviii] Modest yields in small farms and gardens would
be in the range of about 20,000 lbs per acre.[xix] Even with half the area set aside to grow
compost crops each year, simple math reveals that the entire U.S. population could be fed plenty
of vegetables and fruits using two thirds of the area currently in lawns.

Labor Compared to Hours of T.V.

For its members Brookside Farm's role is to provide a
substantial proportion of their yearly vegetable and fruit needs. Using our farming techniques, we estimate
that one person working full time could grow enough produce for ten to twenty
people. By contrast, an individual could
grow their personal vegetable and fruit needs on a very part-time basis,
probably half an hour per day, on average, working an area the size of a small home (700 sq ft in veggies and fruits plus 700 sq ft in cover crops).

American's complain that they feel cramped for time and
overworked. But is this really true or
just a function of addiction to a fast-paced media culture? According to Nielsen Media Research:[xx]

The total average time a household
watched television during the 2005-2006 television year was 8 hours and 14
minutes per day, a 3-minute increase from the 2004-2005 season and a record
high. The average amount of television watched by an individual viewer
increased 3 minutes per day to 4 hours and 35 minutes, also a record. (See
Table 1.)

So if we imagine families having the discipline to cut out a
single sitcom viewing per day, or one baseball or football game per weekend
during the growing season, that would free-up sufficient time to become
self-reliant in fruits and vegetables and likely improve overall health.[xxi]

(A note of caution though, an article from The Onion warns
"that viewing fewer than four hours of television a day severely inhibits a
person's ability to ridicule popular culture.")[xxii]

Conclusions

For those wanting to contribute to a lower-energy food
system, starting with fresh produce makes sense for several reasons:

(1) Significant production is possible in a small area,
often what people already have,

(2) Tools and equipment are simple, inexpensive and readily
available,

(3) Fruits and vegetables are heavy due to high water
content, and therefore energy-intensive to transport and process either by
canning or dehydrating,

(4) Growing vegetables and fruits is generally more energy
intensive than other crops because of high fertilizer and irrigation inputs,

(5) Quality declines rapidly after harvest, so home or
locally available food has higher nutritional value and usually tastes better,

(6) Labor, packaging and storage demands of fruits and
vegetables are high in mechanized production systems, making the investment in
home-grown produce financially competitive, and

(7) Gardening and small-scale fruit and vegetable farming
lend themselves to physical and social activities across generation and income
gaps that improve health and enhance a shared sense of purpose and fun.

[i] This
graphic was developed based on the principles discussed in Chapter 2 of Daly
and Farley "Ecological Economics:
Principles and Applications" (2004, Island Press)

[ii] http://www.storyofstuff.com/

[iii] http://www.footprintnetwork.org and
http://www.rprogress.org/ecological_footprint/about_ecological_footprint.htm;
the original ecological footprint analysis (EF1) is at the first reference, and
the second type (EF2) at the second. The
major difference between the two is that the second attempts to incorporate
aquatic systems (e.g., oceans), total terrestrial productivity, and
biodiversity reserves.

[iv] Graphic
from: http://www.footprintstandards.org/

[v] For the
50% figure see: http://www.footprintnetwork.org/gfn_sub.php?content=global_footprint; for the greater than 90% and discussion of
differences between methods see: http://www.rprogress.org/publications/2006/Footprint%20of%20Nations%2020...

[vi] http://scitizen.com/screens/blogPage/viewBlog/sw_viewBlog.php?idTheme=14&idContribution=1397

[vii] http://globalpublicmedia.com/richard_heinbergs_museletter_big_melt_meets_big_empty

[viii] http://www.climatecodered.net/

[ix] http://css.snre.umich.edu/main.php?control=detail_proj&pr_project_id=29

[x] See
especially Table 2. in: http://www.fao.org/docrep/005/AC911E/ac911e05.htm

[xi] http://www.theoildrum.com/node/2431

[xii]
Graphic from: http://css.snre.umich.edu/css_doc/CSS01-06.pdf

[xiii] http://www.ncseonline.org/NLE/CRSreports/04nov/RL32677.pdf

[xiv]
Although no date appears on this paper, it is clearly related to a 1994
conference and workshop: http://www.cias.wisc.edu/pdf/energyuse.pdf;
http://www.cias.wisc.edu/archives/1994/01/01/energy_use_in_the_us_food_system_a_summary_of_existing_research_and_analysis/index.php

[xv] http://www.energyfarms.net/

[xvi] http://asi.ucdavis.edu/conferences/farmtofork/;
http://californiaagriculture.ucop.edu/0704OND/editover.html;
http://asi.ucdavis.edu/Research/ASI_Program_Proposal_Brief_-_Energy_Life_Cycle_Assessment_in_Food_Systems_9-13.pdf

[xvii] http://earthobservatory.nasa.gov/Study/Lawn/

[xviii] http://www.ers.usda.gov/Data/FoodConsumption/FoodGuideIndex.htm

[xix] An
acre is ca. 43,000 sq ft. Our experience
at Brookside Farm suggests about 1 lb of produce per square foot of cultivated
space is to be expected, with infrastructure and paths requiring significant
area. Fruit orchards in Mendocino County yield about 20,000 lbs per
acre: http://www.co.mendocino.ca.us/agriculture/pdf/2006%20Crop%20Report.pdf

[xx]http://www.nielsenmedia.com/nc/portal/site/Public/menuitem.55dc65b4a7d5adff3f65936147a062a0/?vgnextoid=4156527aacccd010VgnVCM100000ac0a260aRCRD

[xxi] http://www.csun.edu/science/health/docs/tv&health.html

[xxii] http://www.theonion.com/content/node/30863

Sorghum is a drought tolerant plant is similar to both corn
and sugarcane and is our highlighted energy crop at Brookside Energy Farm in Willits and
the Energy Garden
in Sebastopol. Like sugar cane the stalk is
filled with sweet juice and can be pressed to make syrup. This crop is special
because it is capable of simultaneously producing both food and biofuel and
provides stacked functions
including:

1. Grain for human and animal food

2. Juice can be extracted and converted into a high calorie
syrup

3. Juice can be directly fermented and processed into
ethanol

4. Stalks can be shredded and used as a component in
livestock feed

5. Stalks can be pressed into briquettes and burned

6. Stalks can be used as a mulch

7. Stalks can be aerobically composted

Stacking functions is
a critical concept when we begin to think about energy crops or crops grown
primarily to be used as fuel. A crop with stacked functions including (sorghum,
sunflowers, Jerusalem Artichokes) offers the farmer not just one, but multiple
uses.

As many of you have noticed, energy crops are drawing a great deal of
attention because they have the potential to be renewable, and therefore a more
reliable form of energy. However, when growing energy crops we must be ready to make
a choice for food or fuel. While natural sugar and oil are useful (if not essential), we have to
ask whether or not burning these substances is the best use. We also need to
re-think the way that biofuels are made.

Many studies have shown that the net energy gain with biofuel
is very slim, and this is especially the case when inorganic fertilizer, pesticides,
and coal or natural gas is used for crop production and processing. When you
then add the cost of transportation of these fuels from the refinery to the
pump then the carbon neutrality and energy profit is slim to none.

In response, the Energy Farm Program is experimenting with
sorghum because it is unique and has the potential to provide both food and
fuel. Furthermore, we want to contrast local, organic biofuel against the
industrial model to see if we might achieve a net energy gain by using natural
methods for soil fertility, crop cultivation, and harvest. Once processed this
crop is intended to support further agricultural activities or to be used by locally,
reducing extraneous transport and lost energy.

During July we have been working to produce
aerobic compost at the Willits Energy Farm. The compost project of July and
August is important because we are seeking to demonstrate a model of
sustainable farming practices that focus on soil fertility and includes an on-site
composting center. The challenge for this project is to produce 10 piles of
aerobic compost by sometime in August.

Currently, there are three piles that have reached high
temperatures of up to 150°F and are now entering their “cool down” phase where
they will sit until the fall. These piles have turned from a mixture of green
and yellow to a dark brown/black color. Three other piles are beginning to
decompose and will need to be turned a couple of more times before being
allowed to cure. We are going to let the piles sit for a couple of months so
that they can mature and allow the compost to develop a diverse set of micro
organisms including bacteria, fungi, protozoa, nematodes, and macro arthropods.

Quality compost is the substance and inoculum in which
a farmer can add organic matter to the soil and promote nutrient cycling. This is a natural
way in which a farmer can promote healthy plants, resist soil born
diseases, and ensure the fertility of the land for years to come. By producing
quality compost it is possible to eliminate the need for non-organic fertilizers
and pesticides because the soil will be very healthy and feed the plants in a
way that will help make them less susceptible to pests. It is useful to think
of pests as a way that nature “selects against” diseased and unhealthy plants. When
a plant is unhealthy it puts out a signal that insects tune-in to. Soon the bugs
come to eliminate the sick plant from the area, effectively selecting against
the weakest plant

Three Piles Under 50% Shade Cloth to Prevent Drying-Out

Compost Section Evolving to Accommodate More Piles

I checked material from one of the compost piles under my microscope today
to see which types of micro organisms were present. Since the pile was
previously hot and newly developed I noticed a good deal of bacteria, some
dormant protozoa, and some fungal spores. I knew that I would see bacteria, but
I wanted to set a "before" image in my mind about what was occurring
inside the pile. In a month I am curious to see whether or not there are more diverse microbes or if biology in the pile slows and becomes dormant.

This method, termed "direct count," is an alternative way of examining
soil and compost that and differs from the standard chemical analysis that most
people are accustomed to. The soil, roots, organic matter, and soil-based
microbes are all interconnected and work together to produce healthy plants and
living soil. The direct count method is useful because it provides a picture of
the life within the soil. We can use this "picture" to make
predictions about the nature and the health of the soil based upon the presence
or absence of certain organisms.

Below is a link to the article: Soil food web - opening the lid of the black
box. This was written by Bart Anderson and appeared on Energy Bulletin in late
2006. It is a great article that provides a synopsis about a truly sustainable way to maintain soil fertility and also describes the
importance of Dr. Ingham's work related to uncovering the interconnected world
of the "Soil Food Web".

During the early part of July we have been working to produce
aerobic compost at the Willits Energy Farm. The compost project of July and
August is important because we are seeking to demonstrate a model of
sustainable farming practices that focus on soil fertility and includes an on-site
composting center. The challenge for this project is to produce 10 piles of
aerobic compost by sometime in August.

Currently, there are two piles that have reached high
temperatures of up to 150°F and are now entering their “cool down” phase where
they will sit until the fall. The two piles have turned from a mixture of green
and yellow to a dark brown/black color. Two other piles are beginning to
decompose and will need to be turned a couple of more times before being
allowed to cure. We are going to let the piles sit for a couple of months so
that they can mature and allow the compost develop a diverse set of micro
organisms including bacteria, fungi, protozoa, nematodes, and macro arthropods.

Quality compost is the substance and inoculum in which
a farmer can add organic matter to the soil and promote nutrient cycling. This is a natural
way in which a farmer can promote healthy plants, resist soil born
diseases, and ensure the fertility of the land for years to come. By producing
quality compost it is possible to eliminate the need for non-organic fertilizers
and pesticides because the soil will be very healthy and feed the plants in a
way that will help make them less susceptible to pests. It is useful to think
of pests as a way that nature “selects against” diseased and unhealthy plants. When
a plant is unhealthy it puts out a signal that insects tune-in to. Soon the bugs
come to eliminate the sick plant from the area, effectively selecting against
the weakest plant

This blogcast features Bill using a scythe to harvest the compost crop that was planted last November. He is working on the infield of an abandoned baseball diamond. In November, we seeded a cover crop in the infield section in order to loosen soil in the compacted soil, test the suitability of the infield for growing crops, and to provide a carbon component for our compost piles. Oats, Rye, and Barley have been grown under dry land conditions and make up a majority of the carbon that is being harvested from this section.

There are big plans in store for the compost area in the month of July. Now that we have a good amount of carbon to work with, we can begin to mix it with the abundant nitrogen that we are obtaining from food scraps and plant detritus from harvest and weeding. If we are going to grow vegetables in an intensive spacing then we will need to ensure that we are returning micro nutrients and organic matter back to the area where they have been grown. We have five sections in rotation and I would like to add two piles to each section, thus our goal is to have 10 piles of aerobic compost curing by the end of the month. This is an ambitious goal, but it is essential as we rotate our crops and continue to build the fertility of the soil.

Click here to watch the blogcast related to harvesting compost crops and to see the compost section.

Carting Pallets to the Compost Section

Mature Oats, Barley, and Rye Provide a Carbon-Component for Compost

Is Bill Working or Having Fun??

Two of Ten Piles in the Compost Section

Now that many of the crops in our garden are established we are able to start interplanting beneficial flowers among the rows.

There are many benefits to interplanting flowers and herbs among the rows of energy crops or vegetables

1. Attract Pollinators
2. Attract Beneficial Insects
3. Repel Garden Pest Insects
4. Increase Biodiversity in the Garden
5. Increase Production
   

* Miscanthus w/ Strawflower * Soybeans w/ Marigolds * Sunflowers w/ Cosmos

This is the final part of a 3 blog set that discusses the importance of healthy soil, the need for compost at the Willits Energy Farm, and which factors lead to good compost. This blog will summarize our findings and report on the next step to addressing the needs of the site.

After examining the compost under the microscope, David, Jason, and I discussed the possibility of bringing some to the site. All of us agreed that we should probably not bring the compost made of grape pomace to the farm as it most likely contains alcohols and the presence of ciliates were a clear indicator of anaerobic conditions. Also the introduction of symphylums and springtails to the site was unthinkable. Balance is important when making compost, and a gigantic supply of one material (in this case grape pomace) does not make for a healthy end product. The gentleman who wanted to sell the compost made it clear that this was not his best batch and recommended that it might be better as mulch.

We also decided against the animal manure compost for one main reason-we were unsure of the temperatures of that the compost reached, and therefore, could not be sure that the weed seeds had been destroyed. The land at Brookside Elementary is gifted with a small weed bank. There is perennial grass that has been growing on the site, but otherwise we do not have any significant weeds in our beds. If we were to introduce this compost then we could run the risk of seeding the site with a problem that could eventually become a nightmare and more work.

After all this analysis we are back to the same problem of how to feed the soil and still intensively grow crops. Since compost is indeed a priority, I think that we must begin to treat it so. David and I fixed a broken stand pipe and we should now be able to water the compost piles that are located in the northwest corner of the site. We have amassed an abundance of biomass from clearing away the sod. Also, the warm spring weather has led to a burst of grass and clover growth along the perimeter of the fence. I can harvest the grass and clover with a push mower or a kama and use it as the nitrogen source for the compost piles. If we can keep on top of the compost situation we will end up with a bit of material to feed back into the soil after the spring vegetables.

I hope these blogs made it clear that it is important to consider the soil first as you begin or continue to grow food and energy crops. We must not simply mine the soil and we cannot extract its vitality without a cost. If we are going to grow crops intensively than we must be equally intensive about our compost processes and crop rotations. Compost is not a mere catch phrase as much as it is a means of emergency preparedness in relation to local food security. When Cuba faced an immediate scarcity of supplies resulting from the collapse of the Soviet Union, they lacked sufficient compost to grow crops on land that had been depleted through decades of practicing the conventional agricultural model that utilizes inorganic fertilizers, herbicides, and pesticides. A ready supply of compost will be a great resource for any community looking to turn to local agriculture as a response to an immediate and long-term need for food. It can help boost depleted lands and sustain the vitality of rich soil. I believe that we can do a lot for our communities and the environment if we can pursue agricultural practices that make the effort to grow and sustain healthy topsoil.

Welcome to Part 2 of the blog related to the importance of maintaining healthy soil at the Willits Energy Farm. If you followed the first blog, you will know that we will eventually need to do something about compost at the site. The soil is healthy and can sustain the crops that are being grown in it; however, to grow so intensively without the addition of compost is unsustainable. I felt that the addition compost would take the pressure off the land while we continued to work to establish the crops and the desired composting system. I consulted with David Drell and Jason Bradford and we thought that it might be a good idea, in this first year, to possibly import some compost if the source is not too far away. The plan to import soil is defiantly not how we want the site to operate in the long-term, yet, the health of the soil is a first priority and this is a consideration that we cannot afford to overlook, even if it means importing some compost.

There are multiple people offering “compost for sale”, however, one needs to be careful about the quality of compost that you are buying. Some stuff that is touted as “compost” is no better than mulch, and the processes in which the organic material was created may not have been aerobic or hot enough to kill weed seeds (150°F). If the organic material was composted anaerobically, it will contain natural alcohols that can turn a plant to slime by dissolving portions of the cell walls. Finally, anaerobic compost will lack fungi and the compost will thus lack the diversity need for a healthy soil food web. If the material has the potential of causing harm instead of helping the situation we will not bring it to the site.

David and I decided to visit a farm site that as been know for creating quality compost and take samples to view under the microscope. By talking with the person who makes the compost and by looking at the types of microbes inside it we can make a fairly good assessment of whether or not we want it on the site. When we arrived to the farm there were two different compost piles to choose from. One of the compost piles had been created using grape pomace from a nearby vineyard that had been mixed with straw bedding and spoiled hay. There were earthworms in that compost and also a great deal of little white bugs. Some of the bugs were spring tails and others were symphylums. These symphylums are particularly nasty if they do not have a good deal of fungal biomass to eat. If there is no fungi the symphylums will eat plant roots!

The other pile of compost was made in windrows that had not been turned for 8-9 months. It was composed of 70% horse manure, 25% made of goat droppings, and 5% chicken manure. It looked very nice and had an earthy smell, no visible bugs.

After getting the samples home I examined them under the microscope.

Grape Pomace Compost:

The grape pomace had a diversity of organisms. Lots of bacteria and large dark strands of fungal hyphae were present (large dark fungal strands are a good thing). Unfortunately, there seemed to be a large number of ciliates, which are protozoa that thrive in anaerobic conditions. I also noticed bacterial feeding nematodes (small round worms) that feed high on the soil food web. While the fungal strands looked promising, the presence of symphylums and springtails coupled with the knowledge that some of the material might have been fermented into natural alcohols made this compost into something that we did not want to bring to the site at Brookside Elementary.

Animal Manure Compost:

The animal manure compost was bacterially dominated and had beneficial protozoa in it. Beneficial protozoa include testate amoeba and flagellates. These protozoa are important because they eat the bacteria and help cycle the nitrogen contained in the bacteria into plant available forms. I noticed some large, dark fungal strands; however this compost did not have the fungal biomass that the grape pomace compost. I did not notice any nematodes. Out of the two compost samples, I felt that this one was the best.

Grape Pomace Compost

Grape Pomace Compost (Notice it is purple)

Manure-Based Compost

Example of a Bacterial Feeding Neamatode (The Spots Toward the Tail Are Bacteria)

Example of a Fungal Strand with a Red Spore

Example of Two Cilliates (Protazoa). They Are Feeding On Bacteria

When working the land to grow food and energy crops our first priority and greatest resource is the soil. It has been said if humans take care of the soil then the sun and water will care for the plants. At the Willits Energy Farm we are developing a mini-farm template that factors in crop rotation systems, bed preparation, and a multi-faceted compost center designed to preserve and grow soil. As is evident by the abundance of earthworms that fill almost every scoop of soil, the site at Brookside Elementary has a nutrient rich soil high in organic matter. A soil analysis from December 2005 indicates that the percentage organic matter is 6% and there exists large reserves of exchangeable nutrients.

The same report shows that the soil is rich in microbial life including fungi, protozoa, and especially bacteria. Micro organisms are important aspect of the soil because they participate in the process of nutrient cycling and nutrient retention. Nutrient cycling is the conversion of organic matter and the exchangeable nutrients within the soil into plant available “foods”. Cycling occurs when bacteria and fungi decompose and metabolize organic matter in the soil. These microbes store the nutrients in their bodies (retention) and are themselves eaten in the processes and interactions within the natural food web of the soil. When a diverse set of microbes are interacting in the soil the nutrients are less susceptible to leeching out and the fungal threads and bacterial glues help form soil aggregates that resist compaction. As you might expect, healthy compost is a primary inoculum soil based micro organisms.

Given what has been said about the value of healthy soil, we have begun to plant out and seed spring annuals. These vegetables are transplanted in closely spaced sets and seeded densely in order to grow the greatest amount of food in the smallest space possible. On marginal soil this sort of approach may not produce desired yields as the plants struggle to find the nutrients in land that has been depleted or lacks the nutrient cycling provided by diverse microbial life. Although we have excellent soil to begin this project with we need to be careful not to deplete the reserves that have been stored up through the years. The Grow Biointensive method that we are pattering some of our crop spacing after admits that in order to produce large crops yields in a small space you will need to replenish the land and soil to make up for the nutrients used in the processes of growth. It is clear that we will need to amend the soil with compost after each section of annuals is finished.

Example of Intensive Planting of Onions and Lettuce

Intensive Planting of Peas, Beets, Cabbage, and Swiss Chard