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Agroecology




Agroecology is the Science of applying Ecological concepts and principles to the design, development, and management of Sustainable Agricultural Systems .

Agroecology is the science of sustainable agriculture; the methods of agroecology have as their goal achieving sustainability of agricultural systems balanced in all spheres. This includes the socio-economic and the ecological or environmental.

An agroecosystem is a key idea in agroecology - they are defined as "semi-domesticated Ecosystems that fall on a gradient between ecosystems that have experienced minimal human impact, and those under maximum human control, like cities."1 Thus agroecosystems are generally defined as novel ecosystems that produce food via farming under human guidance. While farming methods vary, traditional agroecosystems generally differ from natural ecosystems in six ways:2
  • Agroecosystems are maintained at an early Successional state. Most crops are early successional species which require an abundance of Sunlight , Water , and Fertilizer s. Naturally, these crop species would be replaced by later successional plants. Humans prevent the natural process of succession by clearing crop land of other vegetation and protecting crops against natural disturbances such as fires or storms.

  • Agroecosystems generally exhibit is one method of counteracting monoculture hazards.

  • In addition to monoculture, agroecosystem crops are generally planted in rows. In natural ecosystems, different species of plants grow mixed together, making them less vulnerable to Pests .

  • Agroecosystems have greatly simplified Biodiversity and Food Chain s. Predator s, especially, are targeted and largely eliminated by Pest Control methods.

  • Plowing , which is unlike any natural soil disturbance, exposes soil to Erosion , reduces organic matter, and results in a loss of chemical elements.

  • Crops are genetically modified and Artificially Selected to optimize yield.


The agroecologist views any farming system primarily with an ecologist's eye; that is, it is not firstly economic (created for a commodity and profit), nor industrial (modeled after a factory). In fact, agroecosystems are both understood and designed following ecological principles. For example, integrated pest management aims to control problematic pests through introduction of other species, not application of pesticides or herbicides to kill that pest. An common example of this would be intercropping to attract beneficial insects within rows of a given plagued crop. The insects would balance the disturbed ecology represented by the pest, thus eliminating unsustainable practices such as increasingly intensified pesticide use.

The term itself appeared in the late 1970's. It arose from the recognition that Green Revolution-era agroecosystems were highly dependent upon inputs such as pesticides, capital-intensive machinery, and specific seed varieties engineered or bred in the Global North . The impacts of such agricultural systems have tended to exacerbate the intertwined social, political, and economic problems of the developing countries, or the Global South .

K.H.W. Klages is credited as one of the first to discuss ecology and agriculture.

Practitioners take a critical view of modern industrial agricultural techniques, and see the industrial model as fundamentally or radically (at its roots) unsustainable.

Some current world issues that tie into agroecology - and its coupling of agronomy with the social sciences - include food sovereignty and rural development.

An important movement which can be related to agroecology is Agrarianism . Another current trend that has informed much work in agroecology is traditional agriculture or indigenous agriculture.


LATIN AMERICA AND AGROECOLOGY


Because of the ideological differences between industrial or mechanized agriculture and agroecology, its application has thus far been relatively limited in the U.S. (the country where industrial agriculture has been advanced the furthest). Latin America's experiences with North American Green Revolution agricultural techniques have opened space for agroecologists. Some countries where agroecological research and practice have flourished include Cuba and Brazil.

Traditional or indigenous knowledge represents a wealth of possibility for agroecologists. The relationship between agronomists and traditional (often subsistence farmers) practitioners has been termed an "exchange of wisdoms." This recognizes that Western science has some solutions and innovations to offer, while local knowledge systems developed over thousands of years have just as much, if not more, to offer. This becomes more evident still when the importance and uniqueness of local ecologies are understood as underpinning agricultural systems.


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