Agroecology: The Science Of Sustainable Agriculture, Second Edition [Miguel A Altieri] on *FREE* shipping on qualifying offers. This new edition. Miguel A. Altieri received a BS in Agronomy from the University of Chile and a Ph.D He has been a Professor of Agroecology at UC Berkeley since in the. Our research group uses the concepts of agroecology to obtain a deep understanding of the nature of agroecosystems and the principles by which they function.


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Biological control agro-ecology Research Description: Our research group uses the concepts of agroecology to obtain a deep understanding of the nature of agroecosystems and the principles by which they function.

Throughout our research and writings we have aided in the emergence of agroecology as the discipline that provides the basic ecological principles miguel altieri agroecology how to study, design, and manage sustainable agroecosystems that are both productive and natural resource conserving, and that are also culturally-sensitive, socially-just and economically viable.

Miguel Altieri - Wikipedia

The event brought together some of the world's leading radical thinkers and activists working on the issues miguel altieri agroecology food and the future of farming. Presentations addressed the following questions: How do we understand and tackle the interlinked agrarian and environmental crises?

He is an advocate of sustainable agriculture and is highly critical of large agribusiness corporations such as Cargill, Monsanto, and ADM.


These small units of production were responsible for 41 percent of the agricultural output for domestic consumption and for producing at the regional level 51 percent of the maize, 77 percent of the beans, and 61 percent of the potatoes.

Africa has approximately 33 million small farms, representing 80 percent of all farms in the region. The majority of Miguel altieri agroecology farmers many of them are women are smallholders, with miguel altieri agroecology of all farms below 2 hectares and 90 percent of farms below 10 hectares.


Low-resource agriculture produces the majority of miguel altieri agroecology, almost all root, tuber, and plantain crops, and the majority of legumes. Most basic food crops are grown by small farmers with virtually no or little use of fertilizers and improved seed.

Once self-sufficient in cereals, Africa now has to import millions of tons to fill the gap.

Of the majority of more than million rice farmers who live in Asia, few cultivate more than 2 hectares miguel altieri agroecology rice. China has probably 75 million rice farmers who still practice methods similar to those used more than 1, years ago.

Monthly Review | Agroecology, Small Farms, and Food Sovereignty

Maize yields in traditional Mexican and Guatemalan cropping systems are about 2 tons per hectare or about 4, calories, sufficient to cover the annual food needs of a typical miguel altieri agroecology of people. In the s the chinampas of Mexico raised growing beds in shallow lakes or swamps had maize yields of 3.

At that time, these were the highest long-term yields achieved anywhere in Mexico. In comparison, average maize yields in the United States in were 2.

Miguel Altieri: On agroecology, and why it is the solution to hunger and food security

Traditional multiple cropping systems provide as much as 20 percent of the world food supply. Polycultures constitute at least 80 percent of the cultivated area of West Africa, while much of the production of staple crops in the Latin American tropics also occurs in polycultures. These diversified farming systems in which the small-scale farmer produces grains, fruits, vegetables, fodder, and animal products in the same field or garden out-produce the yield per unit of single crops such miguel altieri agroecology corn grown alone miguel altieri agroecology large-scale farms.

A large farm may produce more corn per hectare than a small farm in which the corn is grown as part of a polyculture that also includes beans, squash, potatoes, and fodder.

Miguel A. ALTIERI | Our Environment at Berkeley

But, productivity in terms of harvestable products per unit area of polycultures developed by smallholders is higher than under a single crop with the same level of management. Yield advantages can range from 20 percent to 60 miguel altieri agroecology, because polycultures reduce losses due to weeds by occupying space that weeds might otherwise occupyinsects, and diseases because of the presence of multiple speciesand make more efficient use of the available resources of water, light, and nutrients.

Not only do small- to medium-sized farms exhibit higher yields than conventional larger-scale farms, but they do this with much lower negative impacts on the environment, as research shows that small farmers take better care of natural resources, including reducing soil erosion and conserving biodiversity.

However, an important part of the higher per hectare income of small farms in the United States is that they tend to by-pass middlemen and sell directly to the public, restaurants, or markets. They also tend to receive a miguel altieri agroecology for their local, and frequently organic, products.

The inverse relationship between farm size and output can be attributed to the more efficient use of land, water, biodiversity, and other agricultural resources by small farmers.


So in terms of converting inputs into outputs, society would be better off with small-scale farmers. Building strong rural economies in the Global South based miguel altieri agroecology productive small-scale farming will allow the people of the South to remain with their families in the countryside.