Cutting-edge tech that will change farming
MIKE Zelkind stands at one end of what was once a shipping container and opens the door to the future.
Thousands of young collard greens are growing vigorously under a glow of pink-purple lamps in a scene that seems to have come from a sci-fi movie, or at least a NASA experiment. But Zelkind is at the helm of an earthbound enterprise. He is chief executive of 80 Acres Farms, with a plant factory in an uptown Cincinnati neighbourhood where warehouses sit cheek by jowl with detached houses.
Zelkind is part of a radical shift in agriculture in which plants can be grown commercially without a single sunbeam. A number of technological advances have made this possible, but none more so than innovations in LED lighting.
“What is sunlight from a plant’s perspective?” Zelkind asks. “It’s a bunch of photons.”
Light-emitting diodes use less energy, give off little heat and can be manipulated to optimise plant growth.
“People haven’t begun to think about the real impact of what we are doing,” says Zelkind, who is using light recipes to grow, for example, two types of basil from the same plant: sweeter ones for the grocery store and more piquant versions for chefs.
For Zelkind, a former food company executive, his indoor farm and its leading-edge lighting change not just the way plants are grown but also the entire convoluted system of food production, pricing and distribution in the United States.
High-tech plant factories are sprouting across the United States and around the world. Entrepreneurs are drawn to the idea of disrupting the status quo, confronting climate change and playing with a suite of high-tech systems, not least the LED lights. Indoor farming, in sum, is cool.
It has its critics, however, who see it as an agricultural sideshow unlikely to fulfil promises of feeding a growing urbanised population.
Zelkind agrees that some of the expectations are unrealistic, but he offers an energetic pitch: He says his stacked shelves of crops are fresh, raised without pesticides and consumed locally within a day or two of harvest. They require a fraction of the land, water and fertilizers of greens raised in conventional agriculture. He doesn’t need varieties bred for disease resistance over flavor or plants genetically modified to handle the stresses of the field. And his harvest isn’t shipped across the country in refrigerated trucks from farms vulnerable to the effects of climate change.
“We think climate change is making it much more difficult for a lot of farms around the country, around the world,” he says, speaking from his office overlooking a demonstration kitchen for visiting chefs and
We feel the time is right for us to make the leap because the lighting efficiency is there. – Tisha Livingston, President of 80 Acres Farms
others.
In addition to shaping the plants, LEDs allow speedy, yearround crop cycles. This permits Zelkind and his team of growers and technicians to produce 200,000 pounds of leafy greens, vine crops, herbs and microgreens annually in a 12,000-square-foot warehouse, an amount that would require 80 acres of farmland (hence the company’s name).
Zelkind says he can grow spinach, for example, in a quarter of the time it takes in a field and half the time in a greenhouse. Growing year-round, no matter the weather outside, he can produce 15 or more crops a year. “Then multiply that by the number of levels and you can see the productivity,” he said.
Zelkind and his business partner, 80 Acres President Tisha Livingston, acquired the abandoned warehouse, added two shipping containers and converted the interior into several growing zones with sophisticated environmental systems that constantly monitor and regulate temperature, humidity, air flow, carbon dioxide levels and crop health. Grown hydroponically, the plant roots are bathed in nutrientrich water. The moisture and unused nutrients exhaled by the plants are recycled.
But it is the LED lighting that has changed the game. Conventional greenhouses have relied on high-pressure sodium lamps to supplement sunlight, but HPS lights can be ill-suited to solar-free farms because they consume far more power to produce the same light levels. They also throw off too much heat to place near young greens or another favoured factory farm crop, microgreens. Greenhouses, still the bulk of enclosed environment agriculture, are moving to a combination of HPS and LED lighting for supplemental lighting, though analysts see a time when they are lit by LEDs alone.
In the past three years, Zelkind says, LED lighting costs have halved, and their efficacy, or light energy, has more than doubled.
Production in the Cincinnati location began in December 2016. In September, the company broke ground on the first phase of a major expansion 30 miles away in Hamilton, Ohio, that will eventually have three fully automated indoor farms totalling 150,000 square feet and a fourth for 30,000 square feet of vine crops in a converted factory.
“We feel the time is right for us to make the leap because the lighting efficiency is there,” Livingston says. — Washington Post.