World cropland: the pie is mostly crust
The edible-landscaping trend is catching on across the country, and with food prices rising, it has taking sadly predictable turns. A Boulder, Colo. entrepreneur, for example, has tilled up his and several of his neighbors’ yards and started an erosion-prone, for-profit vegetable-farming operation. It will supplement his income, but it won’t make a nick in the food crisis.
That’s because the mainstays of home gardening—vegetables and fruits—are not the foundation of the human diet or of world agriculture. Each of those two food types occupies only about 4 percent of global agricultural land (and a smaller percentage in this country), compared with 75 percent of world cropland devoted to grains and oilseeds. Their respective portions of the human diet are similar.
Suppose that half of the land on every one-acre-or-smaller urban/suburban home lot in the entire nation were devoted to food-growing. That would amount to a little over 5 million acres (pdf) sown to food plants, covering most of the space on each lot that’s not already covered by the house, a deck, a patio, or a driveway. (And in many places it couldn’t be done without cutting down shade trees and planting on unsuitably steep slopes).
That theoretical 5 million acres of potential home cropland compares with about 7 million acres of America’s commercial cropland currently in vegetables, fruits, and nuts, and 350 to 400 million acres of total farmland. The urban and suburban area to be brought into production would not approach the number of healthy acres of native grasses and other plants that are slated to be plowed up to make way for yet more corn, wheat, soybeans, and other grains under the newly passed federal Farm Bill.
A nationwide grow-your-own wave would send good vibes through society, ripples that could be greatly amplified by community and apartment-block gardening. But front- and backyard food, even if everyone grew it, would not cover the country’s produce needs, much less displace our huge volume of fresh-food imports.
We could, instead, plant every yard to wheat, corn, or soybeans, which would account only for a little over two percent of the US land sown to those crops. Other policies, like dispensing with grain-fed meat and fuel ethanol, would free up far more grain-belt land than that.
Not even a poke in the eye
I’ve played a part in the promotion of domestic food-growing, and I now I seem to hear daily from people who believe that it’s the best alternative to industrial agriculture (as in, “I’ll show Monsanto and Wal-Mart that I don’t need their food!"). Even though most prominent home-lot food efforts, like the “100-Foot Diet Challenge,” also try to draw attention to bigger issues, the wider message can get lost in the excitement. Whatever its benefits, replacing your lawn with food plants will not give Big Agribusiness the big poke in the eye that it needs, nor will it save the agricultural landscapes of the nation or world.
