"Sustainable" means many things to many people. The law that created the Leopold Center defines a sustainable agriculture as one that maintains "economic and social viability while preserving the high productivity and quality of Iowa's land."
In general, sustainable agriculture addresses the ecological, economic and social aspects of agriculture. To be sustainable, agriculture can operate only when the environment, its caretakers and surrounding communities are healthy.
Sustainable agriculture, as defined by the U.S. Department of Agriculture in the 1990 Farm Bill, should
"...over the long term, satisfy human needs, enhance environmental quality and natural resource base, make the most efficient use of nonrenewable resources and integrate natural biological processes, sustain economic viability and enhance quality of life."
Another definition comes from the Sustainable Agriculture Research and Education (SARE) program of the USDA's Cooperative State Research, Education, and Extension Service (CSREES). Sustainable agriculture refers to an agricultural production and distribution system that
- Achieves the integration of natural biological cycles and controls
- Protects and renews soil fertility and the natural resource base
- Optimizes the management and use of on-farm resources
- Reduces the use of nonrenewable resources and purchased production inputs
- Provides an adequate and dependable farm income
- Promotes opportunity in family farming and farm communities
- Minimizes adverse impacts on health, safety, wildlife, water quality and the environment
Read more from SARE and download an award-winning publication, What is Sustainable Agriculture?
Wendell Berry may have said it best years ago in his definition:
A sustainable agriculture does not deplete soils or people.
The Center's first director, Dennis Keeney, outlined key components of sustainable agriculture in 1989:
- Crop rotations
- Animal husbandry
- Social issues
- Role of industry
- Cultural practices
- Soil erosion
- Use of scarce resources
- Role of technologies
Interdependence also is important in sustainable agriculture, according to professor emeritus John Ikerd, University of Missouri:
A sustainable agriculture must be economically viable, socially responsible and ecologically sound. The economic, social and ecological are interrelated and all are essential to sustainability.
An agriculture that uses up or degrades its natural resource base, or pollutes the natural environment, eventually will lose its ability to produce. It's not sustainable.
An agriculture that isn't profitable, at least over time, will not allow its farmers to stay in business. It's not sustainable.
An agriculture that fails to meet the needs of society, as producers and citizens as well as consumers, will not be sustained by society. It's not sustainable.
Earn a degree in sustainable agriculture
Degrees at the masters and doctorate levels in sustainable agriculture are available from Iowa State University. In 2002, ISU was the first land grant school in the United States to offer a Graduate Program in Sustainable Agriculture (GPSA). This interdepartmental program involves more than 50 faculty from 17 academic departments or units and is supported by the Henry A. Wallace Endowed Chair for Sustainable Agriculture, the Leopold Center, the ISU College of Agriculture and Life Sciences and the ISU Graduate College. For additional information, go to the program's web site: www.sust.ag.iastate.edu/gpsa/.
The Center also has supported development of eductional programs in manure management, integrated pest management, Iowa Master Conservationist offered through ISU Extension and Outreach, as well as programs related to sustainable agriculture at Iowa's community colleges.