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No Dirt? No Farm? No Problem. The Potential For Soil-Less Agriculture Is Huge
It’s a growing industry — $9.5 billion in sales is expected to nearly double in the next five years — that stems, in part, from concerns about growing enough food to feed a worldwide population expected to hit 10 billion in the next 30 years.
At Plenty’s South San Francisco hydroponics growing facility, a million plants produce leafy greens that are sold through area grocery stores. The company plans to open a farm in Compton this year.
(Plenty)
Imagine kale that doesn’t taste like a punishment for something you did in a previous life. Envision leafy greens that aren’t limp from their journey to your plate. Anticipate the intense flavor of just-picked herbs that kick up your latest culinary creation a notch or three.
Then consider the possibility that such advancements will play a role in altering the face of agriculture, becoming sources of flavorful, fresh produce in “food deserts” and making farm-to-table restaurant cuisine possible because produce is grown on the premises, even in urban areas.
This is the potential and the promise of hydroponics (a term that also includes aeroponics and aquaponics systems), the soil-less cultivation of crops in controlled environments. It’s a growing industry — $9.5 billion in sales is expected to nearly double in the next five years — that stems, in part, from concerns about growing enough food to feed a worldwide population expected to hit 10 billion in the next 30 years.
The growing method isn’t new. The Hanging Gardens of Babylon, dating to the 6th century B.C., maybe a precursor to today’s hydroponics, if they existed. (Historians disagree on that as well as where the gardens were.) Then, as now, technology is a key to giving growers, not Mother Nature, more control overproduction.
The size of today’s systems varies. They might be as simple and compact as an in-home system that’s about the size of a couple of loaves of bread stacked on top of each other. Some of the growing popularity of those units may be connected to the pandemic, according to Paul Rabaut, director of marketing for AeroGarden, which produces systems for in-home crop production.
“As soon as the pandemic was declared in mid-March and the quarantine took effect, we saw immediate growth spikes, unlike anything we’d ever seen before,” he said. Those spikes resulted, he said, from the need for entertainment beyond Netflix and jigsaw puzzles, a desire to minimize trips to the grocery store and the promise of teachable moments for kids now schooled at home.
At the other end of the spectrum are large urban farms. Plenty, for instance, has a South San Francisco hydroponics growing facility where a million plant sites produce crops, some of which are sold through area grocery stores. The company hopes to open a farm in Compton this year that’s expected to be about the size of a big-box store and will grow the equivalent of 700 acres of food.
Plenty scientists, engineers and growers at work in their South San Francisco hydroponics growing facility.
(Plenty)
“It’s a super vibrant community with a rich agricultural history,” Nate Storey, a cofounder of the vertical farming company, said of the Compton facility. “It also happens to be a food desert.
“Americans eat only about 30% of what they should be eating as far as fresh foods,” he said. “We started this company because we realized the world needed more fresh fruits and vegetables.”
As different as hydroponics growing systems are, most have this in common: The plants thrive because of the nutrients they receive and the consistency of the environment and can produce crops of fresh leafy greens and other vegetables, various herbs and sometimes fruits.
Such controlled-environment agriculture is part of the larger trend of urban farms, recognized last year by the May opening of the U.S. Department of Agriculture’s Office of Urban Agriculture and Innovative Production. The farms’ proximity to larger markets means produce can be delivered quickly to consumers, whether they’re grocery shoppers, airline passengers, students or communities in need or restaurants, an industry that has been devastated in the last year.
Today’s micro-and mega-farms have taken on increased importance, partly because of world hunger, which will increase as the population grows.
Add increasing urbanization that is gobbling available agricultural land in many countries, mix in climate change and the scramble for water to grow crops — as much as 70% of the world’s water is used for agriculture — and the planet may be at a tipping point.
No single change in the approach to feeding the world will shift the balance by itself.
Hydroponic farming is “a solution,” said Alexander Olesen, a cofounder of Babylon Micro farms in Virginia, which uses its small growing units to help corporate cafeterias, senior living centres, hotels and resorts provide fresh produce, “but they are not the solution.”
Babylon Micro farms in Virginia provides fresh produce for corporate cafeterias, senior living centers, hotels and resorts.
(Babylon Micro-Farms Inc.)
For one thing, not all crops are viable. Nearly everything can be grown using hydroponics but some crops, such as wheat, some root vegetables (including carrots, beets and onions), and melons and vining crops, are impractical. The easiest crops to grow: leafy greens, including spinach and lettuce; microgreens; herbs such as basil, cilantro, oregano and marjoram; some vegetables, such as green peppers and cucumbers; and certain fruits, including tomatoes and strawberries.
Although hydroponic farming means crops grow faster — thus increasing output — the process comes with a significant carbon footprint, according to “The Promise of Urban Agriculture,” a report by the Department of Agriculture/Agricultural Marketing Service and Cornell University Small Farms Program. Lights generate heat, which then must be removed by cooling. Lettuce grown in traditional greenhouses is far cheaper, the report says.
If these crops can be grown traditionally — in a garden or in a commercial field — why bother with growing systems that are less intuitive than planting seeds, watering and harvesting? Among the reasons:
Climate control: Such indoor agriculture generally means consistent light, temperatures, nutrients and moisture for crops no longer held hostage by nature’s cycles of drought, storms and seasons.
Environmental friendliness: Pesticides generally aren’t used and thus create no harmful runoff, unlike field-grown crops.
Productivity: Leafy greens tend to be cool-season crops, but in a controlled environment, it’s an any-time-of-year crop without the worry of depleting the soil because of overuse because, of course, there is no soil.
Use of space: AeroFarms, a former steel mill in Newark, N.J., boasts that it can produce 2 million pounds of food each year in its 70,000 square feet, or about 1.3 acres. California’s Monterey County, by contrast, uses nearly 59,000 acres — out of 24.3 million acres statewide of ranches and farms — to grow its No. 1 crop, which is leaf lettuce valued at $840.6 million, its 2019 crop report showed.
AeroFarms in Newark, N.J. boasts it can produce 2 million pounds of food each year at its 70,000-square-foot facility in Newark, N.J.
(AeroFarms)
Food safety: In E. coli outbreaks in late October and early November of last year, fingers pointed to romaine lettuce that sickened consumers in 19 states, including California. In November and December of 2019, three other outbreaks of the bacterial illness were traced to California’s Salinas Valley. A Food and Drug Administration study, released in May with results from that trio of outbreaks, “suggest(s) that a potential contributing factor has been the proximity of cattle,” whose faeces often contain the bacteria and can find its way into water systems.
That’s less of an issue with crops in controlled-environment agriculture, said Alex Tyink, president of Fork Farms of Green Bay, Wis., which produces growing systems suitable for homes and schools.
“In the field, you can’t control what goes where,” he said, including wildlife, livestock or even birds that may find their way into an open growing area.
And as for workers, “The human safety approaches that we take [with] people in our farm make it hard for them to contaminate even if they wanted to,” he said.
“Before people walk in, they gown up, put their hair in nets, beards in nets, put on eye covering and bootie covers for their shoes, then walk through a water bath.”
None of the statistics matter, though, unless the quality of soil-less crops matches or exceeds that produced traditionally.
Not a contest, new-age growers say. Flavors of leafy greens, for example, tend to be more detectable and, in some cases, more intense.
So much so that when AeroFarms introduced its baby kale in a New York grocery store, Marc Oshima, a cofounder and chief marketing officer, says he saw a woman do what he called a “happy dance” when she sampled this superfood. The version that AeroFarms produces is lighter and has a “sweet finish,” Oshima said, compared with adult kale grown in traditional ways that some say make the superfood fibrous and bitter.
Storey, the cofounder of Plenty, judged his Crispy Lettuce mix successful when his children got into a “rolling-on-the-floor fistfight” over a package of it.
Some credit for that flavor can be attributed to the time from harvest to market. Arizona and California are the top lettuce producers in the U.S., but by the time the greens get to other parts of the country, they have lost some of their oomph. AeroFarms and Plenty, for instance, distribute their commercial products to nearby grocery stores in New York and the Bay Area, respectively, where their time to market is significantly reduced.
And when was the last time you had a salad on an aeroplane flight that didn’t taste like water gone bad? Before the pandemic constricted airline traffic, AeroFarms was growing greens to be served to passengers on Singapore Airlines flights from New York’s JFK. The fresh vegetables travelled just five miles from the warehouse to Singapore’s catering kitchen, a new twist on the farm to (tray) tabletop.
Because the turnaround from harvest to market is shorter, Storey said his products often last several weeks when refrigerated.
Leafy green vegetables are grown by AeroFarms.
(Emily Hawkes)
And perhaps best of all? Growers say that because the greens have a flavorsome peppery, some like mustard — salad dressing may be optional, perhaps dispossessed in favor of the flavor of naked greens.
Getting consumers interested in vegetables and incorporating those foods into their diets is especially important, growers say, because of skyrocketing rates of obesity, diabetes and heart disease, especially for populations in food deserts.
Tyink grew up in rural Wisconsin but moved to New York to pursue a career in opera. By chance, he sampled some produce from a rooftop garden that he called life-altering. “My eating habits changed because [the greens] changed my emotional connection to food,” he said.
His exposure to homelessness and poverty on the streets of New York also focused his attention on what people consume and why. Price and convenience often drive bad food decisions and unhealthy habits.
Young farmers in training can help change those habits; some of Fork Farms’ systems are used in schools and other nonprofit organizations for children. Kids become accidental ambassadors for the nutrient-rich crops, and the fruits of their labors go to school cafeterias or to local food distribution centres in their communities.
“I really think when you lose fresh, locally produced food, you lose something of [the] culture,” said Lee Altier, professor of horticulture at Chico State University, where he has been working with students to develop its aquaponics program. “I think it is so important when communities have an awareness … that this is for their social integrity.”
As for the future, much still needs to be done to put such products in the right hands at the right time. That requires investment, innovation and technology to perfect the systems and keep costs under control, never mind persuading buyers and consumers that food that’s healthy can also be satisfying.
Is it a puzzle worth solving? Storey thinks so. “I want to live in a world where [we create] delicious, amazing things,” he said, “knowing that they are not coming at a cost that we don’t want to pay.”
About Catharine Hamm
Catharine Hamm is the former Travel editor for the Los Angeles Times and became a special contributor in June 2020. She was born in Syracuse, N.Y., to a peripatetic family whose stops included Washington, D.C.; Honolulu; and Manila. Her varied media career has taken her from McPherson, Kan., to Kansas City, Mo., San Bernardino, Salinas and L.A. Hamm has twice received individual Lowell Thomas Awards, and the Travel section has been recognized seven times during her tenure as editor. Her favourite place? Always where she’s going next.
International Webinar On Urban Farming - Soilless Cultivation
27th January 2021, between 9 am to 1 pm IST
organised by the
Department of Botany, Sri Venkateswara University, Tirupati, Andhra Pradesh, INDIA
in collaboration with
Universitas Bengkulu, Indonesia
Universiti Malaysia Kelantan, Malaysia
Industrial Technology Institute (CISIR), Sri Lanka
With the support of
CropG1 ,dFarms USA, Hydrilla, SAM Agro Biotech, SRC Malaysia, Sujay Biotech, Veggitech UAE and Urban Kisaan
on 27th January 2021, between 9 am to 1 pm IST.
Speakers are
1. A perspective of Hydroponics by Mr Vijay Bhaskar Noti, dFarm Inc., USA
2. Sustainable Farming with Multiloop Aquaponics by Mrs Mamatha, Hydrilla
3. Aeroponics: A versatile research tool in modern Agriculture by Dr Jagadeesh, SAM Agro Biotech
4. Diversity in Hydroponics by Prof. G. Sudarsanam, Sri Venkateswara University
5. Application of ARBUSCULAR MYCORRHIZAL FUNGI In Hydroponics and Aeroponics by Dr M. Lakshmi Prasad, Sujay Biotech
6. Hydroponics Scope and Opportunities by Bhaskar Rao, VeggiTech, UAE
7. Plant Health in Soilless Cultivation: Management of Deficiencies, Diseases and Pests By Dr Purushottam Dewang, CropG1
8. Hydroponic Urban Farming in Malaysia under MITRA by Chandrasekar, Sai Ram Capital, Malaysia
9. Entrepreneurship in Urban Farming by Dr P. Sairam, Urban Kisaan
Please fill Free Registration form and submit using the following link
https://forms.gle/52WaVECrqpEFQh4w8
*eCertificates & webinar link will be provided to the registered participants only
*Organisers are not responsible for network failures
For more information please contact
Prof.G.Sudarsanam
Convener of the Webinar
Head, Department of Botany
Sri Venkateswara University
Tirupati -517503
E-mail: sudarsanamg@gmail.com
WhatsApp: +91-9989053632
The Future of Food: Inside The World's Largest Urban Farm – Built on a Rooftop
On top of a striking new exhibition hall in the southern 15th arrondissement of Paris, the world’s largest urban rooftop farm has started to bear fruit. Strawberries, to be precise: small, intensely flavoured and resplendently red
In Paris, urban farmers are trying a soil-free approach to agriculture that uses less space and fewer resources. Could it help cities face the threats to our food supplies?
Urban farming on a Parisian rooftop. Photograph: Stéphane de Sakutin/AFP/Getty Images
08 Jul 2020
On top of a striking new exhibition hall in the southern 15th arrondissement of Paris, the world’s largest urban rooftop farm has started to bear fruit. Strawberries, to be precise: small, intensely flavoured and resplendently red.
They sprout abundantly from cream-coloured plastic columns. Pluck one out to peer inside and you see the columns are completely hollow, the roots of dozens of strawberry plants dangling into thin air.
From identical vertical columns nearby burst row upon row of lettuces; near those are aromatic basil, sage, and peppermint. Opposite, in narrow, horizontal trays packed not with soil but coco coir (coconut fibre), grow heirloom and cherry tomatoes, shiny aubergines, and brightly coloured chards.
“It is,” says Pascal Hardy, surveying his domain, “a clean, productive and sustainable model of agriculture that can in time make a real contribution to the resilience – social, economic and also environmental – of the kind of big cities where most of humanity now lives.
And look: it really works.”Hardy, an engineer, and sustainable development consultant, began experimenting with vertical farming and aeroponic growing towers – as those soil-free plastic columns are known – on his Paris apartment block roof five years ago.
This space is somewhat bigger: 14,000 sq metres, the size (almost exactly) of two football pitches. Coronavirus delayed its opening by a couple of months, but Nature Urbaine, as the operation is called, is now up and running, and has planted roughly a third of the available space.
Already, the team of young urban farmers who tend it have picked, in one day, 3,000 lettuces and 150 punnets of strawberries. When the remaining two-thirds of the vast rooftop of Paris Expo’s Pavillon 6 are in production, 20 staff will harvest up to 1,000kg of perhaps 35 different varieties of fruit and vegetables, every day.“
We’re not ever, obviously, going to feed the whole city this way,” cautions Hardy. “In the urban environment you’re working with very significant practical constraints, clearly, on what you can do and where. But if enough unused space – rooftops, walls, small patches of land – can be developed like this, there’s no reason why you shouldn’t eventually target maybe between 5% and 10% of consumption.”
Nature Urbaine is already supplying local residents, who can order fruit and veg boxes online; a clutch of nearby hotels; a private catering firm that operates 30 company canteens in and around Paris; and an airy bar and restaurant, Le Perchoir, which occupies one extremity of the Pavillon 6 rooftop.
Nature Urbaine. Photograph: Magali Delporte/The Guardian
Perhaps most significantly, however, this is a real-life showcase for the work of Hardy’s flourishing urban agriculture consultancy, Agripolis, which is currently fielding inquiries from around the world – including in the UK, the US, and Germany – to design, build and equip a new breed of soil-free inner-city farm.“The method’s advantages are many,” he says. “First, I don’t know about you, but I don’t much like the fact that most of the fruit and vegetables we eat have been treated with something like 17 different pesticides, or that the intensive farming techniques that produced them are such huge generators of greenhouse gases.“I don’t much like the fact, either, that they’ve travelled an average of 2,000 refrigerated kilometres to my plate, that their quality is so poor, because the varieties are selected for their capacity to withstand that journey, or that 80% of the price I pay goes to wholesalers and transport companies, not the producers.”
Produce grown using this soil-free method, on the other hand – which relies solely on a small quantity of water, enriched with organic nutrients, minerals and bacteria, pumped around a closed circuit of pipes, towers and trays – is “produced up here, and sold locally, just down there. It barely travels at all,” Hardy says.“It uses less space. An ordinary intensive farm can grow nine salads per square metre of soil; I can grow 50 in a single tower. You can select crop varieties for their flavour, not their resistance to the transport and storage chain, and you can pick them when they’re really at their best, and not before.”
No pesticides or fungicides are needed, no soil is exhausted, and the water that gently showers the plants’ roots every 12 minutes is recycled, so the method uses 90% less water than a classic intensive farm for the same yield. The whole automated process can be monitored and controlled, on site or remotely, with a tablet computer.
Urban farming is not, of course, a new phenomenon. The mayor of Paris, Anne Hidalgo, aims eventually to have at least 100 hectares of rooftops, walls and facades covered with greenery – including 30 hectares producing fruit and vegetables.
A programme called Les Parisculteurs invites local groups to come up with suitable projects for up to a dozen new sites every year.Inner-city agriculture is booming from Shanghai to Detroit and Tokyo to Bangkok. Strawberries are being grown in disused shipping containers; mushrooms in underground carparks. Not all techniques, however, are environmentally friendly: ultra-intensive, 10-storey indoor farms that have sprung up in the US rely on banks of LED lighting and are major consumers of energy, Hardy says.
Aeroponic farming, he says, is “virtuous”. The equipment weighs little, can be installed on almost any flat surface, and is cheap to buy: roughly €100 to €150 per sq metre. It is cheap to run, too, consuming a tiny fraction of the electricity used by some techniques.
Aeroponic farming is ‘virtuous’, says Pascal Hardy. Photograph: Magali Delporte/The Guardian
Produce grown this way typically sells at prices that, while generally higher than those of classic intensive agriculture, are lower than soil-based organic growers. In Paris, Nature Urbaine should break even, Hardy estimates, some time next year – a few months later than planned because of the pandemic
.There are limits to what farmers can grow this way, of course, and much of the produce is suited to the summer months. “Root vegetables we cannot do, at least not yet,” he says. “Radishes are OK, but carrots, potatoes, that kind of thing – the roots are simply too long. Fruit trees are obviously not an option. And beans tend to take up a lot of space for not much return.”
But Agripolis runs a smaller test farm, on top of a gym and swimming pool complex in the 11th arrondissement, where it experiments with new varieties and trials new techniques. A couple of promising varieties of raspberries are soon to make the transition to commercial production.
Urban agriculture is not the only development changing the face of farming. As with almost every other sector of the economy, digitisation and new technologies are transforming the way we grow food.
Artificial intelligence (AI) and the internet of things are beginning to revolutionise farming, from driverless, fully automated farm machinery that can sow seeds and fertilise and water soil with maximum precision to systems that monitor exactly how healthy individual animals are and how much they are producing (a concept known as the “connected cow”).
Other AI systems analyse satellite and remote ground sensor data, for example, to monitor plant health, soil condition, temperature and humidity and even to spot potential crop diseases.
Drones, too, have multiple potential uses on farms. With the world’s bee population in steep decline due to global heating, pesticides, and other factors, drones are increasingly being used to pollinate crops fields and fruit orchards. To avoid wasting pollen by wafting it randomly at crops, or the damage to individual flowers caused by drones rubbing against them, scientists in Japan have developed a system in which a drone uses what can only be described as a bubble gun to blow balls of specially formulated liquid containing pollen at individual blossoms.
With global food production estimated to need to increase by as much as 70% over the coming decades, many scientists believe genetic editing, which has already been used to create crops that produce higher yields or need less water to grow, will also have to play a bigger role.
The technique could help build plant and animal resistance to disease, and reduce waste. For example, with methane known to be a stronger greenhouse gas than carbon dioxide, research is under way into the stomach bacteria of cows in the hope that tweaking animals’ gut microbes may eventually allow them to produce not just more meat, but also less gas.
Seating at Le Perchoir. Photograph: Magali Delporte/The Guardian
Urban farming of the kind being practised in Paris is one part of a bigger and fast-changing picture. “Here, we’re really talking about about building resilience, on several levels – a word whose meaning I have come to understand personally,” says Hardy, pointing to the wheelchair he has been forced to use since being injured by a falling tree.
“That resilience can be economic: urban farming, hyper-local food production, can plainly provide a measure of relief in an economic crisis. But it is also environmental: boosting the amount of vegetation in our cities will help combat some of the effects of global heating, particularly urban ‘heat islands’.”
Done respectfully, and over time, inner-city agriculture can prompt us to think differently both about cities, by breaking down their traditional geography of different zones for working, living and playing, and about agriculture, by bringing food production closer into our lives. “It’s changing paradigms,” says Hardy.