T he making of Preparation 503 began just after dawn on a cold October morning at Stephen Decater's Live Power Community Farm. As the sun rose over Mendocino County's Round Valley, Decater waited near the barn where an 18-month-old Angus cross named Red was chewing his last breakfast. Although he seemed relaxed, this was a solemn affair for the 59-year-old Decater, who's spent the last 23 years running his family's 40-acre farm under the principles of biodynamics, an alternative organic-farming method that attaches near-religious significance to otherwise mundane activities such as planting, harvesting and slaughter.

"Before I prepare to kill an animal from the farm, my attitude is one of gratitude for the animal's life," he told me. He said a silent prayer, moved quietly to Red's stall, pointed a .22 rifle between the bovine's chocolate-brown eyes, and fired a single shot that dropped nearly 1,000 pounds of animal to the ground.

Red's sacrifice was part of a ritual repeated every autumn, when Decater harvests the raw materials to make homemade tinctures, or, as they are called in biodynamic-speak, "preparations" or "preps." After the cow is butchered, Decater and a handful of volunteers pull out its entrails and stuff them, sausagelike, with chamomile and other flowers, creating Preparation 503, which is added to the farm's compost piles. They also tamp the animal's manure into cow horns, which are buried. Come spring, the horns are unearthed, their rotted contents transformed into Preparation 500, which is believed to stimulate root formation.

For every acre, five tablespoons are mixed with five gallons of water and then applied to the crops and the soil. Over the course of the growing season, other preps, such as 501 (quartz in a horn), are sprayed on the plants and into the air around the farm; 505 (oak bark) and 506 (dandelion) are put in compost and then worked into the soil. It's homeopathic medicine for the very dirt; the small, almost imperceptible quantities of substances imbued with special forces are to have a beneficial effect on the vitality of the soil and the crops.

A biodynamic farm isn't just a place to produce food; it is a convergence zone for cosmic forces that work on the plants, animals, soil, microbes, and, maybe most importantly, the farmer. This is what convinced Decater to convert from organic agriculture to biodynamic in the mid-1980s. "I was out pruning my trees, the fruit trees," he recalled, "and I realized, 'I have no idea what I'm doing.'" Not in a literal sense, he meant, but in a spiritual sense.

Now he envisions his farm as a self-sufficient organism: horses till the fields, sheep provide meat, chickens lay eggs, cows give milk, and all of them contribute manure, which feeds the plants, which feed the people, who care for the land. "Everything is serving something else," he says. "Biodynamics is trying to talk about reverence for everything in the world. We want to bring beauty and light into the world."

Biodynamic farming has been well known, if not mainstream, in Europe since the late 1920s, but perhaps due to its mystical bent it's been slow to catch on in the United States. That is changing as more people see it as an alternative to Big Organic. After all, biodynamic adheres to strict rules that large commercial and corporate organic operations can't hope to follow. As one agricultural theorist writes, biodynamic "makes typical organic farming look like strip mining."

Currently, there are only 102 biodynamic farms and 40 biodynamic wineries in the United States. But that number is steadily growing. Jim Fullmer, the executive director of Demeter USA, which issues its trademarked biodynamic seal to farmers who follow its guidelines, says he's struggling to keep up with the demand from farmers to be certified.

I  first heard about biodynamic at one of those North Bay dinner parties where no one had ever been to a Wal-Mart, yet everyone was appalled that it was selling lettuce stamped with the USDA Organic label. The alternative to the new organic-industrial complex, one woman offered, was biodynamic. She said the biodynamic food she'd eaten in France had been the tastiest she'd ever had; the lettuce had a certain "force" to it.

As the daughter of organic back-to-the-landers, I'm fascinated by alternative farming methods, though I like to temper my enthusiasm with a side order of skepticism. Which is how I came to spend several weekends working at the Live Power farm last fall, breaking my back harvesting its melons, prodding its revered compost piles, witnessing the cosmos-capturing steer slaughter and quietly wondering if this wasn't all just a bunch of hocus-pocus.

Before my visit, I did my homework on biodynamic. All roads led to one man: Rudolf Steiner. In America, the Austrian philosopher is most famous as the father of the holistic Waldorf education movement. In Europe, he's also known as the father of biodynamic agriculture, which he introduced nearly 20 years before the organic movement took off. Steiner had little practical knowledge of farming, but that didn't stop him from laying out detailed ideas for an agriculture that relied upon cosmic forces instead of chemical fertilizers.

The theory behind biodynamic isn't exactly easy to grasp; Steiner's lectures feature such cryptic statements as, "At the moment when the seed is placed in the soil, it is strongly worked upon by the terrestrial forces and it is filled with the longing to deny the cosmic forces, in order that it may spread and grow in all directions." Steiner once admitted to an audience, "To our modern way of thinking, this all sounds quite insane. I am well aware of that."

However, Steiner expected that science would eventually support his theories, and he may yet be proved right. When I mentioned biodynamics to Garrison Sposito, one of the world's most well-regarded soil chemists, I was surprised that he agreed with its basic principles. What about sticking valerian root and dandelions into a compost pile? "Small amounts of certain things can make a difference," said Sposito, who teaches at UC Berkeley. "There might be microbes that are activated, or they might slow-release certain enzymes."

In the early 1990s, John Reganold, a soil science professor at Washington State University's department of crop and soil sciences, started comparing conventional and biodynamic farms. His research, published in the journal Science, found that biodynamic farms had higher soil quality than conventional farms but were just as economically viable. Later studies found no difference between biodynamic and organic crops. Reganold admits that no one really knows how the preps work. "I'm not an organic freak," he told me, yet he called biodynamic "the most holistic system I've seen."

But being biodynamic isn't easy. Demeter USA has codified the world's most stringent organic agricultural guidelines, delineated in a 25-page document that frowns upon artificial fertilizers, petroleum products and other features of "unsustainable agriculture-related industry." Which partly explains why the Decaters have no tractors, just four enormous Belgian draft horses.

Antique farm implements are strewn about the farm. I thought the tools were touchstones of authenticity à la Martha Stewart until I watched sweat pour off an apprentice's brow as he tilled a field, the horses straining to pull a steel plow through dark, weedy earth. Demeter also has a strict ban on "parallel production"—a farm must be entirely biodynamic or not at all. Monocrops are forbidden, and 10 percent of a farm's acreage must be set aside as a natural preserve.

Biodynamic's small scale and anti-corporate ethos mean that you won't generally find it at Whole Foods Market or even at your local farmers market. Live Power, for example, only distributes its harvest through a community-supported agriculture program in which customers subscribe to a year's worth of produce.

Finding biodynamic wine is another story, an easier story to tell. (Vineyards are exempt from the no-monoculture rule.) Winemakers have always prided themselves on their terroir, a very Steinerian idea. And winemakers have never been afraid to embrace whatever it takes to set their products apart. French winemakers started going biodynamic in the 1990s; in 1997, the snooty, 300-year-old Domaine Leflaive vineyard made the switch after blind taste tests almost unanimously favored its wine made from biodynamically grown grapes.

Californian winemakers, still smarting from organic wine's mediocre reputation, were initially slow to see biodynamic's cachet. But soil scientists like Reganold are now courted by wineries. When a biodynamic viticulture consultant writes that "the grape is a truly cosmic plant," wine drinkers don't smirk; they reach for their checkbooks. The biodynamic Napa Valley Araujo Cabernet Sauvignon 2003 recently earned a 91 from Wine Spectator and sells for $215 a bottle.

A fter Red was killed, a small crowd assembled as a traveling butcher skinned the carcass and winched it into the air. The entrails, the size of a small sofa, slid out in one giant blob and were laid out in the afternoon sunlight. Then the volunteers set out to harvest the rest of the prep-making materials. We walked around the pasture, heads bowed, looking for the holy in cow pies. Harald Hoven, a biodynamic farmer and instructor at the Rudolf Steiner College in Fair Oaks, paused to consider a fresh specimen. "Notice how it is perfectly round," he said with a slight German accent, remarking on "how much life and vitality it has."

Flies and yellow jackets buzzed around a couple stuffing chamomile flowers into a soggy section of small intestine. Hoven deposited Red's head near a hose, where two girls were on brain-removal detail. Normally, these sights would have sent me running, but the group was calm and purposeful. Its faith in the importance of what it was doing had a mesmerizing effect.

"By collecting the manure and further contracting it into a cow's horn, we're sort of filing away the energy of the farm for the winter," explained Marney Blair, who runs a biodynamic farm. She said she's been called crazy for believing in things like Preparation 503. "Sometimes it feels like we're floating way out there. But there's a longing to connect in an extremely deep way. It's gospel."

As the day came to a close, the group filed over to a large pit that Decater and his three teenage sons had dug the day before. I gasped. I had already witnessed the death and dismantling of a large mammal and the ensuing magic-potion making. But nothing prepared me for four feet of topsoil the color of a moist fudge brownie. Over the decades, millions of worms and billions of microbes had created this loamy home. Maybe they really do like yarrow, dandelion, chamomile and cow poop.

Hoven reached into the hole and began to stack the manure-laden horns, tips up. The chamomile-and-intestine sausages were to be taken to a place where snow would eventually cover them so, as Steiner had proclaimed, "the cosmic-astral influences will work down into the soil where the sausages are buried."

The ritual was over, and so was the season. It was up to the subterranean creatures to finish the job. Before I took my leave, I remembered my initial visit to the farm. One morning, I had met Decater in a sweet-smelling herb field, where he patiently demonstrated the proper way to clip basil. As we picked, I noticed that his basil had a durability to it that the plants in my backyard garden lacked. The leaves and stems felt stronger.

When Decater carried away a full lug box, I snuck a leaf into my mouth. It certainly tasted better than my own crop. Somehow it seemed richer, with a complex tingle that stayed on my tongue. Or maybe I was imagining things.

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