2 TrendsThe onset of the industrial age brought about various trends that have led us toour present state.The quick rise in population.More people to feed.The greater need for production.Farms required to produce more.The increase in urbanism.Less farms to do more work.Wide-spread ecological impacts.Faith in technological, politicaland economic fixes.Today, “less developed countries” are following a similar trend.Many farmers in these countries choose to grow cash crops rather than subsistence crops.Regions reliant upon cash crops tend to develop adverse, long term environmental problems.
3 Negative ImpactsOur current mass production style of farming has resulted in numerousnegative side-affects:Environmental damagesReduced biodiversityHabitat destructionDeforestationWater, air and soil pollutionSalinization, desertificationDecline in water resourcesand land subsidenceHuman impactsFarm land destructionDamage to soil fertilityReduced nutritional value of foodDecreased economic, social and cultural valuesFor the past several years research has looked at sustainable agricultureas a potential solution to correct and prevent these problems.
4 Defined Sustainable agriculture was addressed by Congress in the Food, Agriculture, Conservation, and Trade Act of Under that law, theterm sustainable agriculture means “an integrated system of plant andanimal production practices having a site-specific application that will,over the long term:satisfy human food and fiber needsenhance environmental quality and the natural resource base upon which the agricultural economy dependsmake the most efficient use of non-renewable resources and on-farm resources and integrate, where appropriate, natural biological cycles and controlssustain the economic viability of farm operationsenhance the quality of life for farmers and society as a whole."
5 Goal The goal of sustainable agriculture is to minimize adverse impacts to the immediateand off-farm environments while providinga sustained level of production and profit.Inherent to this goal is the understandingthat sustainability must be extended notonly globally, but indefinitely in time, andto all living organisms including humans.Simply stated, sustainable agriculture refers to the ability of a farm toproduce food indefinitely, without causing irreversible damage toecosystem health.
6 Traditional MethodsWater harvesting and rainfall. Today 80% of crop production worldwide relies on rainfall.Meso-American farms are often looked upon as proof of past functioning sustainable agricultural systems.Crop RotationNatural FertilizersRaised FieldsTerracesIrrigation CanalsSwamps/LakesHome GardensTree Culture
7 Today’s Methods Today, sustainable farming practices commonly include: crop rotations that mitigate weeds, disease, insect and other pest problems; provide alternative sources of soil nitrogen; reduce soil erosion; and reduce risk of water contamination by agricultural chemicals.pest control strategies that are not harmful to natural systems or people, which include techniques that reduce the need for pesticides by practices such as scouting, use of resistant cultivars, timing of planting, and biological pest controls.increased mechanical/biological weed control.soil and water conservation practices.strategic use of animal and green manures.use of natural or synthetic inputs in a way thatposes no significant hazard to man, animals,or the environment.
8 A. Crop rotation keeps the soil healthy. B. Mixed farms allows the uses of livestock manure.C. Conserving natural areas protects our environment.D. Small changes in practices can help, rather than harm, the environment.E. Grass-fed livestock control weeds without chemicals or mowing.F. Science can determine the right amount of fertilizers and pesticides.G. Farming removes nutrients and fertilizers or manures replace them.H. Farming multiple crops allows farmers to reduce their financial risks by having multiple products to sell.
9 Rules and RegulationsWhile the goal of sustainable agriculture is similarly defined by numerous organizations, there are no strictly defined rules or regulations for farmers to abide by.There are standards and certifications for organic farming, which has similarities to sustainable agriculture, but the two not synonymous.
10 Organic vs. Sustainable Organic farming excludes the use of synthetic inputs, such as synthetic fertilizers, pesticides, herbicides, and GMOs, whereas sustainable agriculture does not.Sustainability aims to balance between what is taken out of the soil with what is returned to it, without relying on outside inputs. This is not necessarily a concern of organic farming.Organic farms constitute only a small percent of farms with a minor impact on the environment. Sustainable agriculture aims to make positive changes on all farms.In the future, large organic farms that rely on machinery and automation, and purchased inputs, will have similar sustainability issues that large conventional farms do today.
11 Politics and Economics: Positive Economic incentives may be used to encourage the use of more environmentally friendly farming techniques and technologies.Sustainable practices can save farmers money because of the reduced need to buy pesticides, herbicides, fertilizers, etc.Sustainable farms tend to have multiple crops leading to both financial security and subsistence for the farmer.Laws, both local and global, could enforce protective standards.Education of environmental situations may help farmers to make better choices.
12 Politics and Economics: Negative Sustainable development is constrained by economic growth. The transition from conventional to sustainable farming is usually costly.Development is viewed as coinciding with consumption.There are vast international inequalities of resource consumption making it hard for many to farm effectively.Enforcement of environmental regulations may be blocked by political and/or economic advances.