Read e-book online Agroecology: The Ecology of Sustainable Food Systems PDF

By Stephen R. Gliessman

ISBN-10: 0849328454

ISBN-13: 9780849328459

The writer truly delineates the significance of utilizing an environment framework for selecting if a specific agricultural perform, enter, or administration determination contributes or detracts from sustainability. He explains how the framework offers the ecological foundation for the functioning of the selected administration technique over the long term. He additionally examines process point interactions, stressing the necessity for knowing the emergent characteristics of populations, groups, and ecosystems and their roles in sustainable agriculture. utilizing examples of farming platforms in a huge array of ecological stipulations, the e-book demonstrates tips to use an atmosphere method of layout and deal with agroecosystems for sustainability.

Providing the theoretical and conceptual framework for this continuously evolving box, Agroecology: The Ecology of Sustainable nutrients structures, moment version explores environmental components and complexities affecting agricultural plants and animals. thoroughly revised, up to date, and transformed, the second one variation comprises new information, new readings, new concerns and case stories, and new suggestions. It comprises thoroughly new chapters, one at the function of farm animals animals in agroecosystems and one at the cultural and neighborhood elements of sustainable foodstuff systems.

The writer in actual fact delineates the significance of utilizing an environment framework for picking if a specific agricultural perform, enter, or administration determination contributes or detracts from sustainability. He explains how the framework presents the ecological foundation for the functioning of the selected administration approach over the long term. He additionally examines approach point interactions, stressing the necessity for figuring out the emergent features of populations, groups, and ecosystems and their roles in sustainable agriculture. utilizing examples of farming structures in a wide array of ecological stipulations, the ebook demonstrates how you can use an surroundings method of layout and deal with agroecosystems for sustainability.

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Additional info for Agroecology: The Ecology of Sustainable Food Systems

Example text

Agriculture uses so much water in part because it uses water wastefully. More than half of the water applied to crops is never taken up by the plants it is intended for (Van Tuijl, 1993). Instead, this water either evaporates or drains out of fields. Some wastage of water is inevitable, but a great deal of waste could be eliminated if agricultural practices were oriented toward conservation of water rather than maximization of production. For example, crop plants could be watered with drip irrigation systems, and production of waterintensive crops such as rice could be shifted away from regions with limited water supplies.

From 2000 to 2003, global grain reserves shrank alarmingly every year, from 635 million tons (a 121-d supply), to 382 million tons (a 71-d supply). 4 shows the world’s annual per capita grain production for each year from 1961 to 2004, as calculated by the Food and Agriculture Organization (FAO) of the United Nations. These data indicate that after trending upward for many years, per capita production of cereal grains has trended downward since reaching a peak in 1984. This situation is the result of reduced annual yield increases combined with continued logarithmic population growth.

For the world as a whole, the rise in land productivity has slowed markedly since about 1990. 1 percent (Brown, 2001). From 2000 to 2003, global grain reserves shrank alarmingly every year, from 635 million tons (a 121-d supply), to 382 million tons (a 71-d supply). 4 shows the world’s annual per capita grain production for each year from 1961 to 2004, as calculated by the Food and Agriculture Organization (FAO) of the United Nations. These data indicate that after trending upward for many years, per capita production of cereal grains has trended downward since reaching a peak in 1984.

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Agroecology: The Ecology of Sustainable Food Systems by Stephen R. Gliessman


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