Entropy

We might think of farming as a natural system, in some way working with nature to grow those natural plants out there in the ground, left to their own devices and undisturbed by the “unnatural” pesticides, herbicides, and fungicides. But the farm is an ordered, organized, linear, countable system created with effort towards a certain end—that is, tasty vegetables each week for you all. Natural systems are not arranged in this way; they don't take effort to maintain. Nature—which is to say “those woods out there,” the consequence of natural systems—is not the farm. And it always wins in the end.

Right now, towards the end of the season, the farm is a mess! It's almost embarrassing. Over the course of the season I put effort towards maintaining the crops that are in production, but as soon as their utility is on the wane we put our effort elsewhere, not wanting to do extra work just to keep that natural reclamation at bay. And without energy put in to weeding, mulching, and rowcovering, first the grass covers the spaces between plants, and the pigweeds grow tall from any square inch of soil exposed to sun, and before we know it there is no longer order. The mower restores some peace of mind, but only long enough to take up the drip tape, the tomato stakes, the fabric mulch, before nature finishes dismantling the agricultural order we had put so much effort into arranging.

If left even longer, for a year or two, woody perennials would arise, seemingly out of nowhere, as happens in unmowed meadows and under power line rights-of-way. Passing birds drop seeds, and, soon enough, a little seedling tree here and there. Eventually, without effort put in to mow the fields and maintain the farm, it would turn into forest. Indeed, a few dozen yards into forest that grows just off the west edge of the farm, lies an old fenceline—that fenceline is a memory of what at one point used to be the edge of the forest, which has since escaped its boundary, now held at bay only by the mower and the occasional chainsaw.

In physics, there is the idea of “entropy:” Everything under the sun and everywhere else inevitably tends toward disorganization, as the amount of energy available for work gets to be less and less over time. I'm sure I'm about to mis-apply the concept here because I'm not writing about some thermodynamic system, but that's okay—I'm no physicist either. The principle I take away is that it takes some energy to keep a particular biological system organized, and over time, disorder—entropy—rises as it seeks its natural equilibrium instead of the “unnatural” carefully ordered state. That natural state might be complex—look at the woods, and the cycles of plants growing, dying, being consumed by insects, bacteria, the fungi in the soil linking trees together in a web of biological communication – yet given this region's fundamental conditions it's the inevitable, characteristic result, absent any outside force.

The only reason there's a treeline by my field at all, of course, is that hundreds of years ago people put their energy towards clearing fields to farm, and it's only due to continued effort that they have remained clear and not reverted back to forest. People from elsewhere say this part of the country is beautiful, green and lush, and, as someone who grew up around here it's hard to appreciate: of course there are forests, of course there is undergrowth, of course highways are lined with trees and smaller gravel roads I drive near the farm are cut out from beneath the overhanging canopy of limbs. But this Mid-Atlantic hardwood forest is a product of our own climate, with four seasons and frequent rain. In another part of the country, the nature that would move in would be a product of that area's own climate and geology underlying its own natural system—the plains states, if left alone, would progress towards grassland. It's not that the area has never seen tree seeds, but that because of climate and geology and soil, trees just don't grow well there, apart from along the creekbeds. A forest of trees would take some effort to establish, and if left alone, would in time revert back to prairie.

And even our forest here—our characteristic Mid-Atlantic forest that grows by default without any particular attention—is itself changing rapidly. Recently I visited some friends nearby and we we walked through their woods. They noted the number of dead and fallen trees: all ash trees. When they moved here years ago, they told me, it was an elm forest. Once the elms died of Dutch Elm disease, it became an ash forest. It's only a matter of time until the last ash trees succumb to the emerald ash borer, and we don't know yet what will fill the space left by the departing ash. My old house is built of chestnut, whose original status as the dominant woodland species here is remembered only by its ubiquity in old buildings, barns, furniture, and how its nuts used to offer a subsistence living to people carving out their own ordered stability in the Shenandoah mountains.

Last January I drove up to Vermont to help a friend fell some trees to clear space for a building. Driving north through Pennsylvania, across into New York and up along the Hudson river, I looked for the transition out of my familiar, homey Mid-Atlantic hardwood forest. Even well into the Hudson valley, the roadside forest looked remarkably similar to what I'm used to around here. Finally, crossing east into Vermont, and with the Green Mountains on the horizon, I saw my first birch tree and soon enough, the ground became snow covered and the forests turned to birch and evergreen. Left to its own devices, nature had tended to create something different in response to different natural conditions.

I often think of Vermont as an agricultural state, with cows, Cabot cheese, and all the back-to-the-lander farming operations supplying fresh, fancy food to New York and Boston—and in fact I had gone up there in part to take a closer look at its rural, agricultural economy. The Hudson valley had been full of small farms, greenhouses, farmstands, but driving north through Vermont, it was only sawmills. I passed sawmills and firewood mills, little small-scale businesses, I passed logging trucks driving along the road—with hardly a farm to be seen. I can't tell you the last time I came across a sawmill here in VA, or passed a log truck on the road, but I can barely go anywhere around here without passing an agricultural operation of one sort or another. Just as with natural systems, the business enterprises that happen to do best as a result of an area's climate, geology, and economics are the ones that over time end up predominating.

The Loudoun Valley, where I am, has long been known for its good soil and agricultural promise—as opposed to the area east of the ridge, between Leesburg and Fairfax, which is remembered for its scrubby useless forest and poor soil. The thoroughly agricultural history of the valley here reflects that, as does the arrangement of farms—this area's rolling hills and creeks has made small-scale land-holding the predominate social arrangement, because unlike in the flat land to the south and west it would take too much work, too much energy, to have expansive plantations here.

My own, particular farm, as idiosyncratic as it is today, it too is shaped by the same forces of place, of geology, of climate, tending towards the low-energy state of this region's characteristic vegetable farming activity. I started off, in the beginning, growing the uncommon crops and storing root vegetables for sale over winter, because there was a better market for those items as a new farmer breaking in. The reason for that, of course, is that it takes more effort to grow spinach, carrots, and beets in this climate, and in this heavy soil. Those crops and that style of mechanized farming was not the characteristic operation well suited to this area. Indeed, I was copying systems familiar to the Northeast, which few people employ down here, to produce crops that were marketable precisely because few people grew them. I had learned to farm from my neighbors, but my farm didn't look anything like theirs.

As I farmed, year by year, making decisions about equipment, about crops and sales models, I tended (as anyone would) to drop the elements that were less successful, or less productive, or that I over time found to be less reliable than others. And as I adjusted towards what works best and grows most easily in this area, I can now look back over time to find that my farm, for some unseen reason, has less and less direct-seeded roots and greens, and more and more of the hot-season summer crops grown from transplants on plastic mulch. I realize that my farm is coming to look more and more like my neighboring vegetable farms I learned from in the beginning. Not because of any particular intention, or even awareness, but by following what produces with the least difficulty, the least energy. Which is, of course, what those other farmers had done, in their own day, regardless of their own interests, abilities, and skills—and they too happened to settle in to the same sort of farm that am being pulled toward today. Like any system in the world—in the universe, even—my farm can't resist the principles of entropy, bending towards the characteristic arrangement that arises with the least complexity, the least special intention.