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Evaluating Tools & Practices
One basis on which to evaluate the tools or practices one chooses for an
organic operation is whether or not they contribute to biodiversity—biodiversity
being one of the principal characteristics of a sustainable organic agriculture.
Crop rotation, cover cropping, farmscaping, companion planting, and intercropping
are outstanding examples of practices that contribute to biodiversity. They
therefore contribute to the long-term stability and sustainability of the
farm agroecosystem. Composting and manuring likewise contribute to biodiversity
but, since the diversity they promote is mostly in soil biota, it is rather
less obvious to the casual observer.
On the other end of the spectrum are practices such as tillage, cultivation,
thermal weeding, solarization, and plastic mulching. Such tools significantly
reduce diversity in the field and tend to move the system in a less sustainable
direction. This, however, does not necessarily make these practices a bad
choice.
Organic farming has often been called natural farming, as it tries to mimic
the processes of nature in producing crops and livestock. However, the analogy
goes only so far, since most agricultural systems are characterized by a struggle
between human and nature, each with a clear notion of what plants and animals
the land ought to support and in what proportions. The farmer is typically
in the position of holding back the natural succession of plant
and animal species through the use of diversity-reducing tools and practices.
The ideal is to bring about an agricultural system in which the long-term
direction emphasizes diversity and sustainability. Among the best visualizations
of this ideal are those emerging from the Permaculture movement.
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