Agronomist Andrew McGuire looks at too opposite problems in managing soil and then lays out a few principles for staying away from two extremes.
There are certain requirements that agriculture must meet to produce food and to keep producing food. We should view them as a hierarchy, such that if the top requirement is not attained, the lower requirements do not mean much, but once the top requirement has been met, we can move to the next one, provided that how we do it does not threaten any of the requirements above it. Each component is required, but not sufficient; all of them are needed.
If nature has not been optimized by any process that we know of, and therefore consists of mostly random mixes of species dictated primarily by natural disturbances, then there is no reason to “follow nature’s lead.” But if we don’t, what are we left with?
We are left with an agriculture based on human ingenuity.
Behind many efforts to make agriculture more sustainable is the idea that our farming systems need to be more like nature. in addition to being false, the whole idea of the “balance of nature” is misleading. From it has come the view that ecosystems are a highly complex, integrated system of interactions between species, complexity that is beyond our understanding. The evidence, however, points to different conclusions.
GUEST AUTHOR: Andrew McGuire
There is a new style of urban agriculture appearing around the world. The efforts differ in details, but they all use buildings or structures not originally designed to grow plants – no greenhouses. Carried out in old shipping containers, warehouses, and high-rises, perhaps even in an old factory or two, these “farms” bring agriculture fully indoors. Without sunshine . . .
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