Sustainable Agriculture ·“.an integrated system of plant and animal production practices.that will >satisfy human food and fiber needs >enhance environmental quality >make the most efficient use of >nonrenewable resources >sustain economic viability >enhance quality of life." 1990:Farm日用 Sustainable Agriculture Sustainable Agriculture • “.an integrated system of plant and animal production practices .that will ¾satisfy human food and fiber needs ¾enhance environmental quality ¾make the most efficient use of ¾nonrenewable resources ¾sustain economic viability ¾enhance quality of life.” 1990 Farm Bill